diff --git a/Cargo.lock b/Cargo.lock
index c449041..e82f6c3 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -102,6 +102,7 @@ version = "0.1.0"
 dependencies = [
  "anyhow",
  "clap",
+ "lazy_static",
  "rand",
  "serde",
  "serde_json",
diff --git a/enemize/Cargo.toml b/enemize/Cargo.toml
index a763a91..6a55151 100644
--- a/enemize/Cargo.toml
+++ b/enemize/Cargo.toml
@@ -8,6 +8,7 @@ edition = "2021"
 [dependencies]
 anyhow = "1"
 clap = { version = "3.1.18", features = ["derive"] }
+lazy_static = "1.4"
 rand = "0.8"
 serde = { version = "1.0", features = ["derive"] }
 serde_json = "1.0"
diff --git a/enemize/src/graph/dungeons.rs b/enemize/src/graph/dungeons.rs
new file mode 100644
index 0000000..5d5bfbc
--- /dev/null
+++ b/enemize/src/graph/dungeons.rs
@@ -0,0 +1,144 @@
+use std::collections::HashMap;
+
+use lazy_static::lazy_static;
+
+use super::item::ItemId;
+
+#[derive(Debug, thiserror::Error)]
+#[error("{0} is not a dungeon room")]
+pub struct NotADungeonRoom(u8);
+
+#[derive(Clone, Copy, Eq, Hash, PartialEq)]
+pub enum Dungeon {
+    HyruleCastle,
+    EasternPalace,
+    DesertPalace,
+    TowerOfHera,
+    AgahnimsTower,
+    PalaceOfDarkness,
+    SwampPalace,
+    SkullWoods,
+    ThievesTown,
+    IcePalace,
+    MiseryMire,
+    TurtleRock,
+    GanonsTower,
+}
+
+pub fn get_dungeon_from_room(room_id: u8) -> Result<Dungeon, NotADungeonRoom> {
+    for (dungeon, rooms) in DUNGEON_ROOMS.iter() {
+        if let Ok(_) = rooms.binary_search(&room_id) {
+            return Ok(*dungeon);
+        }
+    }
+
+    Err(NotADungeonRoom(room_id))
+}
+
+const HYRULE_CASTLE_ROOMS: [u8; 21] = [
+    1, 2, 17, 18, 33, 34, 50, 65, 66, 80, 81, 82, 96, 97, 98, 112, 113, 114, 128, 129, 130,
+];
+
+const EASTERN_PALACE_ROOMS: [u8; 13] = [
+    137, 153, 168, 169, 170, 184, 185, 186, 200, 201, 216, 217, 218,
+];
+
+const DESERT_PALACE_ROOMS: [u8; 10] = [51, 67, 83, 99, 115, 116, 117, 131, 132, 133];
+
+const TOWER_OF_HERA_ROOMS: [u8; 7] = [7, 23, 39, 49, 119, 135, 167];
+
+const AGAHNIMS_TOWER_ROOMS: [u8; 7] = [32, 48, 64, 176, 192, 208, 224];
+
+const PALACE_OF_DARKNESS_ROOMS: [u8; 14] = [9, 10, 11, 25, 26, 27, 42, 43, 58, 59, 74, 75, 90, 106];
+
+const SWAMP_PALACE_ROOMS: [u8; 13] = [6, 22, 38, 40, 52, 53, 54, 55, 56, 70, 84, 102, 118];
+
+const SKULL_WOODS_ROOMS: [u8; 9] = [41, 57, 73, 86, 87, 88, 89, 103, 104];
+
+const THIEVES_TOWN_ROOMS: [u8; 12] = [68, 69, 100, 101, 171, 172, 187, 188, 203, 204, 219, 220];
+
+const ICE_PALACE_ROOMS: [u8; 22] = [
+    14, 30, 31, 46, 62, 63, 78, 79, 94, 95, 110, 126, 127, 142, 158, 159, 174, 175, 190, 191, 206,
+    222,
+];
+
+const MISERY_MIRE_ROOMS: [u8; 18] = [
+    144, 145, 146, 147, 151, 152, 160, 161, 162, 163, 177, 178, 179, 193, 194, 195, 209, 210,
+];
+
+const TURTLE_ROCK_ROOMS: [u8; 17] = [
+    4, 19, 20, 21, 35, 36, 164, 180, 181, 182, 183, 196, 197, 198, 199, 213, 214,
+];
+
+const GANONS_TOWER_ROOMS: [u8; 26] = [
+    12, 13, 28, 29, 61, 76, 77, 91, 92, 93, 107, 108, 109, 123, 124, 125, 139, 140, 141, 149, 150,
+    155, 156, 157, 165, 166,
+];
+
+lazy_static! {
+    static ref DUNGEON_ROOMS: HashMap<Dungeon, &'static [u8]> = {
+        use Dungeon::*;
+
+        let mut rooms = HashMap::new();
+
+        rooms.insert(HyruleCastle, &HYRULE_CASTLE_ROOMS[..]);
+        rooms.insert(EasternPalace, &EASTERN_PALACE_ROOMS[..]);
+        rooms.insert(DesertPalace, &DESERT_PALACE_ROOMS[..]);
+        rooms.insert(TowerOfHera, &TOWER_OF_HERA_ROOMS[..]);
+        rooms.insert(AgahnimsTower, &AGAHNIMS_TOWER_ROOMS[..]);
+        rooms.insert(PalaceOfDarkness, &PALACE_OF_DARKNESS_ROOMS[..]);
+        rooms.insert(SwampPalace, &SWAMP_PALACE_ROOMS[..]);
+        rooms.insert(SkullWoods, &SKULL_WOODS_ROOMS[..]);
+        rooms.insert(ThievesTown, &THIEVES_TOWN_ROOMS[..]);
+        rooms.insert(IcePalace, &ICE_PALACE_ROOMS[..]);
+        rooms.insert(MiseryMire, &MISERY_MIRE_ROOMS[..]);
+        rooms.insert(TurtleRock, &TURTLE_ROCK_ROOMS[..]);
+        rooms.insert(GanonsTower, &GANONS_TOWER_ROOMS[..]);
+
+        rooms
+    };
+    pub static ref DUNGEON_KEYS: HashMap<Dungeon, ItemId> = {
+        use Dungeon::*;
+        use ItemId::*;
+
+        let mut keys = HashMap::new();
+
+        keys.insert(HyruleCastle, HyruleKey);
+        keys.insert(EasternPalace, EasternKey);
+        keys.insert(DesertPalace, DesertKey);
+        keys.insert(TowerOfHera, HeraKey);
+        keys.insert(AgahnimsTower, AgaKey);
+        keys.insert(PalaceOfDarkness, PodKey);
+        keys.insert(SwampPalace, SwampKey);
+        keys.insert(SkullWoods, SkullKey);
+        keys.insert(ThievesTown, ThievesKey);
+        keys.insert(IcePalace, IceKey);
+        keys.insert(MiseryMire, MireKey);
+        keys.insert(TurtleRock, TurtleKey);
+        keys.insert(GanonsTower, GTKey);
+
+        keys
+    };
+    pub static ref DUNGEON_BIG_KEYS: HashMap<Dungeon, ItemId> = {
+        use Dungeon::*;
+        use ItemId::*;
+
+        let mut keys = HashMap::new();
+
+        keys.insert(HyruleCastle, HyruleBigKey);
+        keys.insert(EasternPalace, EasternBigKey);
+        keys.insert(DesertPalace, DesertBigKey);
+        keys.insert(TowerOfHera, HeraBigKey);
+        keys.insert(AgahnimsTower, AgaBigKey);
+        keys.insert(PalaceOfDarkness, PodBigKey);
+        keys.insert(SwampPalace, SwampBigKey);
+        keys.insert(SkullWoods, SkullBigKey);
+        keys.insert(ThievesTown, ThievesBigKey);
+        keys.insert(IcePalace, IceBigKey);
+        keys.insert(MiseryMire, MireBigKey);
+        keys.insert(TurtleRock, TurtleBigKey);
+        keys.insert(GanonsTower, GTBigKey);
+
+        keys
+    };
+}
diff --git a/enemize/src/graph/item.rs b/enemize/src/graph/item.rs
new file mode 100644
index 0000000..13f3f16
--- /dev/null
+++ b/enemize/src/graph/item.rs
@@ -0,0 +1,554 @@
+use std::collections::HashMap;
+use std::hash::{Hash, Hasher};
+
+use lazy_static::lazy_static;
+
+#[derive(Clone, Copy)]
+pub enum ItemType {
+    Normal,
+    Bottle,
+    Special,
+    Progressive { level: u8 },
+    Consumable { found: u8, used: u8 },
+}
+
+impl ItemType {
+    pub fn level(&self) -> u8 {
+        match self {
+            Self::Progressive { level } => *level,
+            _ => 0,
+        }
+    }
+
+    pub fn increase_level(&mut self) {
+        match self {
+            Self::Progressive { ref mut level } => *level += 1,
+            _ => (),
+        }
+    }
+
+    pub fn found(&self) -> u8 {
+        match self {
+            Self::Consumable { found, .. } => *found,
+            _ => 0,
+        }
+    }
+
+    pub fn increase_count(&mut self) {
+        match self {
+            Self::Consumable { ref mut found, .. } => *found += 1,
+            _ => (),
+        }
+    }
+
+    pub fn used(&self) -> u8 {
+        match self {
+            Self::Consumable { used, .. } => *used,
+            _ => 0,
+        }
+    }
+
+    pub fn consume(&mut self) {
+        match self {
+            Self::Consumable { ref mut used, .. } => *used += 1,
+            _ => (),
+        }
+    }
+
+    pub fn usable(&self) -> bool {
+        match self {
+            Self::Consumable { found, used } => found > used,
+            _ => false,
+        }
+    }
+}
+
+#[derive(Clone, Copy)]
+pub struct Item {
+    pub id: ItemId,
+    pub name: &'static str,
+    pub item_type: ItemType,
+}
+
+impl Item {
+    pub fn normal(id: ItemId, name: &'static str) -> Self {
+        Self {
+            id,
+            name,
+            item_type: ItemType::Normal,
+        }
+    }
+
+    pub fn bottle(id: ItemId, name: &'static str) -> Self {
+        Self {
+            id,
+            name,
+            item_type: ItemType::Bottle,
+        }
+    }
+
+    pub fn special(id: ItemId, name: &'static str) -> Self {
+        Self {
+            id,
+            name,
+            item_type: ItemType::Special,
+        }
+    }
+
+    pub fn progressive(id: ItemId, name: &'static str) -> Self {
+        Self {
+            id,
+            name,
+            item_type: ItemType::Progressive { level: 0 },
+        }
+    }
+
+    pub fn consumable(id: ItemId, name: &'static str) -> Self {
+        Self {
+            id,
+            name,
+            item_type: ItemType::Consumable { found: 0, used: 0 },
+        }
+    }
+}
+
+impl PartialEq for Item {
+    fn eq(&self, other: &Self) -> bool {
+        self.id == other.id
+    }
+}
+
+impl Eq for Item {}
+
+impl Hash for Item {
+    fn hash<H: Hasher>(&self, state: &mut H) {
+        self.id.hash(state);
+    }
+}
+
+#[derive(Clone, Copy, Eq, Hash, PartialEq)]
+#[repr(u32)]
+pub enum ItemId {
+    FightersSwordAndShield = 0x00,
+    MasterSword1 = 0x01,
+    TemperedSword = 0x02,
+    GoldenSword = 0x03,
+    FightersShield = 0x04,
+    FireShield = 0x05,
+    MirrorShield = 0x06,
+    FireRod = 0x07,
+    IceRod = 0x08,
+    Hammer = 0x09,
+    Hookshot = 0x0a,
+    Bow = 0x0b,
+    Boomerang = 0x0c,
+    Powder = 0x0d,
+    Bee = 0x0e,
+    Bombos = 0x0f,
+    Ether = 0x10,
+    Quake = 0x11,
+    Lamp = 0x12,
+    Shovel = 0x13,
+    Flute = 0x14,
+    Somaria = 0x15,
+    Bottle = 0x16,
+    PieceOfHeart = 0x17,
+    Byrna = 0x18,
+    Cape = 0x19,
+    Mirror = 0x1a,
+    L1Gloves = 0x1b,
+    L2Gloves = 0x1c,
+    Book = 0x1d,
+    Flippers = 0x1e,
+    MoonPearl = 0x1f,
+    Crystal = 0x20,
+    BugCatchingNet = 0x21,
+    BlueMail = 0x22,
+    RedMail = 0x23,
+    Key = 0x24,
+    Compass = 0x25,
+    HeartContainerNoAnimation = 0x26,
+    Bomb = 0x27,
+    ThreeBombs = 0x28,
+    Mushroom = 0x29,
+    MagicalBoomerang = 0x2a,
+    BottleRedPotion = 0x2b,
+    BottleGreenPotion = 0x2c,
+    BottleBluePotion = 0x2d,
+    RedPotion = 0x2e,
+    GreenPotion = 0x2f,
+    BluePotion = 0x30,
+    TenBombs = 0x31,
+    BigKey = 0x32,
+    DungeonMap = 0x33,
+    GreenRupee = 0x34,
+    BlueRupee = 0x35,
+    RedRupee = 0x36,
+    PendantGreen = 0x37,
+    PendantRed = 0x38,
+    PendantBlue = 0x39,
+    BowAndArrows = 0x3a,
+    BowAndSilverArrows = 0x3b,
+    BottleBee = 0x3c,
+    BottleFairy = 0x3d,
+    HeartContainer = 0x3e,
+    HeartContainerRefill = 0x3f,
+    OneHundredRupees = 0x40,
+    FiftyRupees = 0x41,
+    Heart = 0x42,
+    SingleArrow = 0x43,
+    TenArrows = 0x44,
+    SmallMagic = 0x45,
+    ThreeHundredRupees = 0x46,
+    RedRupee2 = 0x47,
+    BottleGoldenBee = 0x48,
+    FightersSword = 0x49,
+    FluteActive = 0x4a,
+    Boots = 0x4b,
+    MaxBombs = 0x4c,
+    MaxArrows = 0x4d,
+    HalfMagic = 0x4e,
+    QuarterMagic = 0x4f,
+    MasterSword2 = 0x50,
+    BombUpgrade5 = 0x51,
+    BombUpgrade10 = 0x52,
+    ArrowUpgrade5 = 0x53,
+    ArrowUpgrade10 = 0x54,
+    Programmable1 = 0x55,
+    Programmable2 = 0x56,
+    Programmable3 = 0x57,
+    SilverArrows = 0x58,
+    Rupoor = 0x59,
+    Nothing = 0x5a,
+    RedClock = 0x5b,
+    BlueClock = 0x5c,
+    GreenClock = 0x5d,
+    ProgressiveSword = 0x5e,
+    ProgressiveShield = 0x5f,
+    ProgressiveArmor = 0x60,
+    ProgressiveGloves = 0x61,
+    UniqueRngItem = 0x62,
+    NonUniqueRngItem = 0x63,
+    ProgressiveBow = 0x64,
+    ProgressiveBow2 = 0x65,
+    Triforce = 0x6a,
+    PowerStar = 0x6b,
+    TriforcePiece = 0x6c,
+    LightWorldMap = 0x70,
+    DarkWorldMap = 0x71,
+    GTMap = 0x72,
+    TurtleMap = 0x73,
+    ThievesMap = 0x74,
+    HeraMap = 0x75,
+    IceMap = 0x76,
+    SkullMap = 0x77,
+    MireMap = 0x78,
+    PodMap = 0x79,
+    SwampMap = 0x7a,
+    AgaMap = 0x7b,
+    DesertMap = 0x7c,
+    EasternMap = 0x7d,
+    HyruleMap = 0x7e,
+    SewersMap = 0x7f,
+    GTCompass = 0x82,
+    TurtleCompass = 0x83,
+    ThievesCompass = 0x84,
+    HeraCompass = 0x85,
+    IceCompass = 0x86,
+    SkullCompass = 0x87,
+    MireCompass = 0x88,
+    PodCompass = 0x89,
+    SwampCompass = 0x8a,
+    AgaCompass = 0x8b,
+    DesertCompass = 0x8c,
+    EasternCompass = 0x8d,
+    HyruleCompass = 0x8e,
+    SewersCompass = 0x8f,
+    SkeletonKey = 0x90,
+    Reserved0x91 = 0x91,
+    GTBigKey = 0x92,
+    TurtleBigKey = 0x93,
+    ThievesBigKey = 0x94,
+    HeraBigKey = 0x95,
+    IceBigKey = 0x96,
+    SkullBigKey = 0x97,
+    MireBigKey = 0x98,
+    PodBigKey = 0x99,
+    SwampBigKey = 0x9a,
+    AgaBigKey = 0x9b,
+    DesertBigKey = 0x9c,
+    EasternBigKey = 0x9d,
+    HyruleBigKey = 0x9e,
+    SewersBigKey = 0x9f,
+    SewersKey = 0xa0,
+    HyruleKey = 0xa1,
+    EasternKey = 0xa2,
+    DesertKey = 0xa3,
+    AgaKey = 0xa4,
+    SwampKey = 0xa5,
+    PodKey = 0xa6,
+    MireKey = 0xa7,
+    SkullKey = 0xa8,
+    IceKey = 0xa9,
+    HeraKey = 0xaa,
+    ThievesKey = 0xab,
+    TurtleKey = 0xac,
+    GTKey = 0xad,
+    Reserved0xAE = 0xae,
+    Reserved0xAF = 0xaf,
+    Agahnim1 = 0x01ff,
+    Agahnim1Boss = 0x02ff,
+    Agahnim2 = 0x03ff,
+    Agahnim2Boss = 0x04ff,
+    BigBomb = 0x05ff,
+    Crystal1 = 0x06ff,
+    Crystal2 = 0x07ff,
+    Crystal3 = 0x08ff,
+    Crystal4 = 0x09ff,
+    Crystal5 = 0x0aff,
+    Crystal6 = 0x0bff,
+    Crystal7 = 0x0cff,
+    DesertBoss = 0x0dff,
+    EasternBoss = 0x0eff,
+    Smith = 0x0fff,
+    Ganon = 0x10ff,
+    GTArmosBoss = 0x11ff,
+    GTLanmolasBoss = 0x12ff,
+    GTMoldormBoss = 0x13ff,
+    HeraBoss = 0x14ff,
+    IceBoss = 0x15ff,
+    IceBlock = 0x16ff,
+    L1Shield = 0x17ff,
+    L1Sword = 0x18ff,
+    L2Shield = 0x19ff,
+    L2Sword = 0x1aff,
+    L3Shield = 0x1bff,
+    L3Sword = 0x1cff,
+    L4Sword = 0x1dff,
+    MireBoss = 0x1eff,
+    MiseryMireToken = 0x1fff,
+    MireSwitch = 0x20ff,
+    PodBoss = 0x21ff,
+    PurpleChest = 0x22ff,
+    SkullBoss = 0x23ff,
+    SwampBoss = 0x24ff,
+    ThievesBoss = 0x25ff,
+    TurtleBoss = 0x26ff,
+    TurtleRockToken = 0x27ff,
+    ProgressiveMagic = 0x28ff,
+}
+
+lazy_static! {
+    pub static ref ITEMS: HashMap<ItemId, Item> = {
+        use ItemId::*;
+
+        let mut items: HashMap<ItemId, Item> = HashMap::new();
+
+        items.insert(FightersSwordAndShield, Item::normal(FightersSwordAndShield, "Fighters Sword and Shield"));
+        items.insert(MasterSword1, Item::normal(MasterSword1, "Master Sword"));
+        items.insert(TemperedSword, Item::normal(TemperedSword, "Tempered Sword"));
+        items.insert(GoldenSword, Item::normal(GoldenSword, "Golden Sword"));
+        items.insert(FightersShield, Item::normal(FightersShield, "Fighters Shield"));
+        items.insert(FireShield, Item::normal(FireShield, "Fire Shield"));
+        items.insert(FireRod, Item::normal(FireRod, "Fire Rod"));
+        items.insert(IceRod, Item::normal(IceRod, "Ice Rod"));
+        items.insert(Hammer, Item::normal(Hammer, "Hammer"));
+        items.insert(Hookshot, Item::normal(Hookshot, "Hookshot"));
+        items.insert(Bow, Item::normal(Bow, "Bow"));
+        items.insert(Boomerang, Item::normal(Boomerang, "Boomerang"));
+        items.insert(Powder, Item::normal(Powder, "Magic Powder"));
+        items.insert(Bee, Item::normal(Bee, "Bee"));
+        items.insert(Bombos, Item::normal(Bombos, "Bombos"));
+        items.insert(Ether, Item::normal(Ether, "Ether"));
+        items.insert(Quake, Item::normal(Quake, "Quake"));
+        items.insert(Lamp, Item::normal(Lamp, "Lamp"));
+        items.insert(Shovel, Item::normal(Shovel, "Shovel"));
+        items.insert(Flute, Item::normal(Flute, "Flute"));
+        items.insert(Somaria, Item::normal(Somaria, "Cane of Somaria"));
+        items.insert(Bottle, Item::bottle(Bottle, "Bottle"));
+        items.insert(PieceOfHeart, Item::normal(PieceOfHeart, "Piece of Heart"));
+        items.insert(Byrna, Item::normal(Byrna, "Cane of Byrna"));
+        items.insert(Cape, Item::normal(Cape, "Magic Cape"));
+        items.insert(Mirror, Item::normal(Mirror, "Magic Mirror"));
+        items.insert(L1Gloves, Item::progressive(L1Gloves, "Power Gloves"));
+        items.insert(L2Gloves, Item::progressive(L2Gloves, "Titan Mitts"));
+        items.insert(Book, Item::normal(Book, "Book of Mudora"));
+        items.insert(Flippers, Item::normal(Flippers, "Zora's Flippers"));
+        items.insert(MoonPearl, Item::normal(MoonPearl, "Moon Pearl"));
+        items.insert(Crystal, Item::special(Crystal, "Crystal"));
+        items.insert(BugCatchingNet, Item::normal(BugCatchingNet, "Bug Catching Net"));
+        items.insert(BlueMail, Item::normal(BlueMail, "Blue Mail"));
+        items.insert(RedMail, Item::normal(RedMail, "Red Mail"));
+        items.insert(Key, Item::consumable(Key, "Key"));
+        items.insert(Compass, Item::special(Compass, "Compass"));
+        items.insert(HeartContainerNoAnimation, Item::normal(HeartContainerNoAnimation, "Heart Container (no animation)"));
+        items.insert(Bomb, Item::normal(Bomb, "Bomb"));
+        items.insert(ThreeBombs, Item::normal(ThreeBombs, "3 Bombs"));
+        items.insert(Mushroom, Item::consumable(Mushroom, "Mushroom"));
+        items.insert(MagicalBoomerang, Item::normal(MagicalBoomerang, "Magical Boomerang"));
+        items.insert(BottleRedPotion, Item::bottle(BottleRedPotion, "Bottle (Red Potion)"));
+        items.insert(BottleGreenPotion, Item::bottle(BottleGreenPotion, "Bottle (Green Potion)"));
+        items.insert(BottleBluePotion, Item::bottle(BottleBluePotion, "Bottle (Blue Potion)"));
+        items.insert(RedPotion, Item::special(RedPotion, "Red Potion"));
+        items.insert(GreenPotion, Item::special(GreenPotion, "Green Potion"));
+        items.insert(BluePotion, Item::special(BluePotion, "Blue Potion"));
+        items.insert(TenBombs, Item::normal(TenBombs, "10 Bombs"));
+        items.insert(BigKey, Item::special(BigKey, "Big Key"));
+        items.insert(DungeonMap, Item::special(DungeonMap, "Dungeon Map"));
+        items.insert(GreenRupee, Item::normal(GreenRupee, "Green Rupee"));
+        items.insert(BlueRupee, Item::normal(BlueRupee, "Blue Rupee"));
+        items.insert(RedRupee, Item::normal(RedRupee, "Red Rupee"));
+        items.insert(PendantGreen, Item::special(PendantGreen, "Pendant of Courage"));
+        items.insert(PendantRed, Item::special(PendantRed, "Pendant of Wisdom"));
+        items.insert(PendantBlue, Item::special(PendantBlue, "Pendant of Power"));
+        items.insert(BowAndArrows, Item::special(BowAndArrows, "Bow and Arrows"));
+        items.insert(BowAndSilverArrows, Item::special(BowAndSilverArrows, "Bow and Silver Arrows"));
+        items.insert(BottleBee, Item::bottle(BottleBee, "Bottle (Bee)"));
+        items.insert(BottleFairy, Item::bottle(BottleFairy, "Bottle, (Fairy)"));
+        items.insert(HeartContainer, Item::normal(HeartContainer, "Heart Container"));
+        items.insert(HeartContainerRefill, Item::normal(HeartContainerRefill, "Heart Container (refill)"));
+        items.insert(OneHundredRupees, Item::normal(OneHundredRupees, "100 Rupees"));
+        items.insert(FiftyRupees, Item::normal(FiftyRupees, "50 Rupees"));
+        items.insert(Heart, Item::normal(Heart, "Heart"));
+        items.insert(SingleArrow, Item::normal(SingleArrow, "Single Arrow"));
+        items.insert(TenArrows, Item::normal(TenArrows, "10 Arrows"));
+        items.insert(SmallMagic, Item::normal(SmallMagic, "Small Magic Refill"));
+        items.insert(ThreeHundredRupees, Item::normal(ThreeHundredRupees, "300 Rupees"));
+        items.insert(RedRupee2, Item::normal(RedRupee2, "Red Rupee"));
+        items.insert(BottleGoldenBee, Item::bottle(BottleGoldenBee, "Bottle (Golden Bee)"));
+        items.insert(FightersSword, Item::normal(FightersSword, "Fighter's Sword"));
+        items.insert(FluteActive, Item::normal(FluteActive, "Flute (activated)"));
+        items.insert(Boots, Item::normal(Boots, "Pegasus Boots"));
+        items.insert(MaxBombs, Item::normal(MaxBombs, "Max Bomb Upgrade (50)"));
+        items.insert(MaxArrows, Item::normal(MaxArrows, "Max Arrow Upgrade (70)"));
+        items.insert(HalfMagic, Item::normal(HalfMagic, "Half Magic"));
+        items.insert(QuarterMagic, Item::normal(QuarterMagic, "Quarter Magic"));
+        items.insert(MasterSword2, Item::normal(MasterSword2, "Master Sword"));
+        items.insert(BombUpgrade5, Item::normal(BombUpgrade5, "Bomb Upgrade (5)"));
+        items.insert(BombUpgrade10, Item::normal(BombUpgrade10, "Bomb Upgrade (10)"));
+        items.insert(ArrowUpgrade5, Item::normal(ArrowUpgrade5, "Arrow Upgrade (5)"));
+        items.insert(ArrowUpgrade10, Item::normal(ArrowUpgrade10, "Arrow Upgrade (10)"));
+        items.insert(Programmable1, Item::normal(Programmable1, "Programmable 1"));
+        items.insert(Programmable2, Item::normal(Programmable2, "Programmable 2"));
+        items.insert(Programmable3, Item::normal(Programmable3, "Programmable 3"));
+        items.insert(SilverArrows, Item::normal(SilverArrows, "Silver Arrows"));
+        items.insert(Rupoor, Item::normal(Rupoor, "Rupoor"));
+        items.insert(Nothing, Item::normal(Nothing, "Nothing (Null Item)"));
+        items.insert(RedClock, Item::consumable(RedClock, "Red Clock"));
+        items.insert(BlueClock, Item::consumable(BlueClock, "Blue Clock"));
+        items.insert(GreenClock, Item::consumable(GreenClock, "Green Clock"));
+        items.insert(ProgressiveSword, Item::progressive(ProgressiveSword, "Progressive Sword"));
+        items.insert(ProgressiveShield, Item::progressive(ProgressiveShield, "Progressive Shield"));
+        items.insert(ProgressiveArmor, Item::progressive(ProgressiveArmor, "Progressive Armor"));
+        items.insert(ProgressiveGloves, Item::progressive(ProgressiveGloves, "Progressive Gloves"));
+        items.insert(UniqueRngItem, Item::special(UniqueRngItem, "Unique RNG Item (RNG Pool Single)"));
+        items.insert(NonUniqueRngItem, Item::special(NonUniqueRngItem, "Non-unique RNG Item (RNG Pool Multi)"));
+        items.insert(ProgressiveBow, Item::normal(ProgressiveBow, "Progressive Bow")); // *NOT* ProgressiveItem???
+        items.insert(ProgressiveBow2, Item::normal(ProgressiveBow2, "Progressive Bow 2"));
+        items.insert(Triforce, Item::special(Triforce, "Triforce (Single Goal Item)"));
+        items.insert(PowerStar, Item::special(PowerStar, "Power Star (Multi Goal Item)"));
+        items.insert(TriforcePiece, Item::special(TriforcePiece, "Triforce Piece"));
+        items.insert(LightWorldMap, Item::special(LightWorldMap, "Light World Map"));
+        items.insert(DarkWorldMap, Item::special(DarkWorldMap, "Dark World Map"));
+        items.insert(GTMap, Item::special(GTMap, "Ganon's Tower Map"));
+        items.insert(TurtleMap, Item::special(TurtleMap, "Turtle Rock Map"));
+        items.insert(ThievesMap, Item::special(ThievesMap, "Thieves' Town Map"));
+        items.insert(HeraMap, Item::special(HeraMap, "Tower of Hera Map"));
+        items.insert(IceMap, Item::special(IceMap, "Ice Palace Map"));
+        items.insert(SkullMap, Item::special(SkullMap, "Skull Woods Map"));
+        items.insert(MireMap, Item::special(MireMap, "Misery Mire Map"));
+        items.insert(PodMap, Item::special(PodMap, "Palace of Darkness Map"));
+        items.insert(SwampMap, Item::special(SwampMap, "Swamp Palace Map"));
+        items.insert(AgaMap, Item::special(AgaMap, "Agahnim's Tower Map"));
+        items.insert(DesertMap, Item::special(DesertMap, "Desert Palace Map"));
+        items.insert(EasternMap, Item::special(EasternMap, "Eastern Palace Map"));
+        items.insert(HyruleMap, Item::special(HyruleMap, "Hyrule Castle Map"));
+        items.insert(SewersMap, Item::special(SewersMap, "Sewers Map")); // not the same as HyruleMap?
+        items.insert(GTCompass, Item::special(GTCompass, "Ganon's Tower Compass"));
+        items.insert(TurtleCompass, Item::special(TurtleCompass, "Turtle Rock Compass"));
+        items.insert(ThievesCompass, Item::special(ThievesCompass, "Thieves' Town Compass"));
+        items.insert(HeraCompass, Item::special(HeraCompass, "Tower of Hera Compass"));
+        items.insert(IceCompass, Item::special(IceCompass, "Ice Palace Compass"));
+        items.insert(SkullCompass, Item::special(SkullCompass, "Skull Woods Compass"));
+        items.insert(MireCompass, Item::special(MireCompass, "Misery Mire Compass"));
+        items.insert(PodCompass, Item::special(PodCompass, "Palace of Darkness Compass"));
+        items.insert(SwampCompass, Item::special(SwampCompass, "Swamp Palace Compass"));
+        items.insert(AgaCompass, Item::special(AgaCompass, "Agahnim's Tower Compass"));
+        items.insert(DesertCompass, Item::special(DesertCompass, "Desert Palace Compass"));
+        items.insert(EasternCompass, Item::special(EasternCompass, "Eastern Palace Compass"));
+        items.insert(HyruleCompass, Item::special(HyruleCompass, "Hyrule Castle Compass"));
+        items.insert(SewersCompass, Item::special(SewersCompass, "Sewers Compass")); // not the same as HyruleCompass?
+        items.insert(SkeletonKey, Item::special(SkeletonKey, "Skeleton Key"));
+        items.insert(Reserved0x91, Item::special(Reserved0x91, "<Reserved>"));
+        items.insert(GTBigKey, Item::special(GTBigKey, "Ganon's Tower Big Key"));
+        items.insert(TurtleBigKey, Item::special(TurtleBigKey, "Turtle Rock Big Key"));
+        items.insert(ThievesBigKey, Item::special(ThievesBigKey, "Thieves' Town Big Key"));
+        items.insert(HeraBigKey, Item::special(HeraBigKey, "Tower of Hera Big Key"));
+        items.insert(IceBigKey, Item::special(IceBigKey, "Ice Palace Big Key"));
+        items.insert(SkullBigKey, Item::special(SkullBigKey, "Skull Woods Big Key"));
+        items.insert(MireBigKey, Item::special(MireBigKey, "Misery Mire Big Key"));
+        items.insert(PodBigKey, Item::special(PodBigKey, "Palace of Darkness Big Key"));
+        items.insert(SwampBigKey, Item::special(SwampBigKey, "Swamp Palace Big Key"));
+        items.insert(AgaBigKey, Item::special(AgaBigKey, "Agahnim's Tower Big Key"));
+        items.insert(DesertBigKey, Item::special(DesertBigKey, "Desert Palace Big Key"));
+        items.insert(EasternBigKey, Item::special(EasternBigKey, "Eastern Palace Big Key"));
+        items.insert(HyruleBigKey, Item::special(HyruleBigKey, "Hyrule Castle Big Key"));
+        items.insert(SewersBigKey, Item::special(SewersBigKey, "Sewers Big Key")); // not the same as HyruleBigKey?
+        items.insert(SewersKey, Item::consumable(SewersKey, "Sewers Key"));
+        items.insert(HyruleKey, Item::consumable(HyruleKey, "Hyrule Castle Key")); // not the same as SewersKey?
+        items.insert(EasternKey, Item::consumable(EasternKey, "Eastern Palace Key"));
+        items.insert(DesertKey, Item::consumable(DesertKey, "Desert Palace Key"));
+        items.insert(AgaKey, Item::consumable(AgaKey, "Agahnim's Tower Key"));
+        items.insert(SwampKey, Item::consumable(SwampKey, "Swamp Palace Key"));
+        items.insert(PodKey, Item::consumable(PodKey, "Palace of Darkness Key"));
+        items.insert(MireKey, Item::consumable(MireKey, "Misery Mire Key"));
+        items.insert(SkullKey, Item::consumable(SkullKey, "Skull Woods Key"));
+        items.insert(IceKey, Item::consumable(IceKey, "Ice Palace Key"));
+        items.insert(HeraKey, Item::consumable(HeraKey, "Tower of Hera Key"));
+        items.insert(ThievesKey, Item::consumable(ThievesKey, "Thieves' Town Key"));
+        items.insert(TurtleKey, Item::consumable(TurtleKey, "Turtle Rock Key"));
+        items.insert(GTKey, Item::consumable(GTKey, "Ganon's Tower Key"));
+        items.insert(Reserved0xAE, Item::special(Reserved0xAE, "<Reserved>"));
+        items.insert(Reserved0xAF, Item::special(Reserved0xAF, "<Reserved>"));
+        items.insert(Agahnim1, Item::special(Agahnim1, "Agahnim 1 Defeated"));
+        items.insert(Agahnim1Boss, Item::special(Agahnim1Boss, "Agahnim Boss"));
+        items.insert(Agahnim2, Item::special(Agahnim2, "Agahnim 2 Defeated"));
+        items.insert(Agahnim2Boss, Item::special(Agahnim2Boss, "Agahnim 2 Boss"));
+        items.insert(BigBomb, Item::special(BigBomb, "Big Bomb"));
+        items.insert(Crystal1, Item::special(Crystal1, "Crystal 1"));
+        items.insert(Crystal2, Item::special(Crystal2, "Crystal 2"));
+        items.insert(Crystal3, Item::special(Crystal3, "Crystal 3"));
+        items.insert(Crystal4, Item::special(Crystal4, "Crystal 4"));
+        items.insert(Crystal5, Item::special(Crystal5, "Crystal 5"));
+        items.insert(Crystal6, Item::special(Crystal6, "Crystal 6"));
+        items.insert(Crystal7, Item::special(Crystal7, "Crystal 7"));
+        items.insert(DesertBoss, Item::special(DesertBoss, "Desert Boss"));
+        items.insert(EasternBoss, Item::special(EasternBoss, "Eastern Boss"));
+        items.insert(Smith, Item::special(Smith, "Frog Smith"));
+        items.insert(Ganon, Item::special(Ganon, "Ganon"));
+        items.insert(GTArmosBoss, Item::special(GTArmosBoss, "GT Armos Boss"));
+        items.insert(GTLanmolasBoss, Item::special(GTLanmolasBoss, "GT Lanmolas Boss"));
+        items.insert(GTMoldormBoss, Item::special(GTMoldormBoss, "GT Moldorm Boss"));
+        items.insert(HeraBoss, Item::special(HeraBoss, "Hera Boss"));
+        items.insert(IceBoss, Item::special(IceBoss, "Ice Boss"));
+        items.insert(IceBlock, Item::special(IceBlock, "Ice Palace Block"));
+        items.insert(L1Shield, Item::progressive(L1Shield, "L1 Shield"));
+        items.insert(L1Sword, Item::progressive(L1Sword, "L1 Sword"));
+        items.insert(L2Shield, Item::progressive(L2Shield, "L2 Shield"));
+        items.insert(L2Sword, Item::progressive(L2Sword, "L2 Sword"));
+        items.insert(L3Shield, Item::progressive(L3Shield, "L3 Shield"));
+        items.insert(L3Sword, Item::progressive(L3Sword, "L3 Sword"));
+        items.insert(L4Sword, Item::progressive(L4Sword, "L4 Sword"));
+        items.insert(MireBoss, Item::special(MireBoss, "Mire Boss"));
+        items.insert(MiseryMireToken, Item::special(MiseryMireToken, "Misery Mire Entrance Token"));
+        items.insert(MireSwitch, Item::special(MireSwitch, "Misery Mire Switch"));
+        items.insert(PodBoss, Item::special(PodBoss, "PoD Boss"));
+        items.insert(PurpleChest, Item::special(PurpleChest, "Purple Chest"));
+        items.insert(SkullBoss, Item::special(SkullBoss, "Skull Boss"));
+        items.insert(ThievesBoss, Item::special(ThievesBoss, "Thieves Boss"));
+        items.insert(TurtleBoss, Item::special(TurtleBoss, "Turtle Boss"));
+        items.insert(ProgressiveMagic, Item::special(ProgressiveMagic, "Progressive Magic"));
+
+        items
+    };
+}
diff --git a/enemize/src/graph/mod.rs b/enemize/src/graph/mod.rs
new file mode 100644
index 0000000..eb2d62b
--- /dev/null
+++ b/enemize/src/graph/mod.rs
@@ -0,0 +1,3 @@
+pub mod dungeons;
+pub mod item;
+pub mod requirement;
diff --git a/enemize/src/graph/requirement.rs b/enemize/src/graph/requirement.rs
new file mode 100644
index 0000000..2bbece0
--- /dev/null
+++ b/enemize/src/graph/requirement.rs
@@ -0,0 +1,16 @@
+use std::collections::HashSet;
+
+use super::item::Item;
+
+pub struct Requirement(HashSet<Item>);
+
+impl Requirement {
+    pub fn new(items: &[Item]) -> Requirement {
+        Requirement(HashSet::from_iter(items.into_iter().map(|i| *i)))
+    }
+
+    pub fn is_met(&self, items: &[Item]) -> bool {
+        let items = HashSet::from_iter(items.into_iter().map(|i| *i));
+        self.0.is_subset(&items)
+    }
+}
diff --git a/enemize/src/lib.rs b/enemize/src/lib.rs
index a499767..d130be2 100644
--- a/enemize/src/lib.rs
+++ b/enemize/src/lib.rs
@@ -10,6 +10,7 @@ use crate::rom::RomData;
 pub mod asar;
 pub mod bosses;
 pub mod constants;
+pub mod graph;
 pub mod option_flags;
 pub mod randomize;
 pub mod rom;