A map group is a section of the map order generally dedicated to one specific theme. Map groups are made up of 10 maps, with the exception of the Swamp (3) and Elsewhere (33) groups.
Under Group[]
| Level HEX ref | Map HEX ref | Internal Name | Name | Theme |
| 0x05 | 0x00 | Under 0 | Under Skull Mountain 2 | Under |
| 0x04 | 0x01 | Under 1 | Under Skull Mountain 1 | Under |
| 0x06 | 0x02 | Under 2 | Under Skull Mountain 3 | Under |
| 0x3A | 0x03 | Under 3 | Stairway to Oblivion | Under |
| 0x3C | 0x04 | Under 4 | The Black Pit | Under |
| 0x33 | 0x05 | Under 5 | Plethora | Under |
| 0x06 | Under 6 | |||
| 0x07 | Under 7 | |||
| 0x60 | 0x08 | Under 8 | Elsewhere | Under |
| 0x69 | 0x09 | Under 9 | The Crypt (leftover) | Desert |
Isle Group[]
| Level HEX ref | Map HEX ref | Internal Name | Name | Theme |
| 0x22 | 0x0A | Isle 0 | The Cliffs of Illusion | Isle |
| 0x15 | 0x0B | Isle 1 | Knight's Isle | Isle |
| 0x16 | 0x0C | Isle 2 | Whale Grotto | Isle |
| 0x1D | 0x0D | Isle 3 | Coral Blade Grotto | Isle |
| 0x07 | 0x0E | Isle 4 | Isle of the Lion Lord | Isle |
| 0x37 | 0x0F | Isle 5 | Crab Cove | Isle |
| 0x30 | 0x10 | Isle 6 | Alien Isle | Isle |
| 0x45 | 0x11 | Isle 7 | Monster Island | Isle |
| 0x3F | 0x12 | Isle 8 | Scorpion Isle | Isle |
| 0x10 | 0x13 | Isle 9 | Shiskaboss | Isle |
Swamp Group[]
| Level HEX ref | Map HEX ref | Internal Name | Name | Theme |
| 0x13 | 0x14 | Swamp 0 | Devil's Marsh 1 | Swamp |
| 0x3E | 0x15 | Swamp 1 | Bloody Swamp | Swamp |
| 0x14 | 0x16 | Swamp 2 | Devil's Marsh 2 | Swamp |
Urban Group[]
| Level HEX ref | Map HEX ref | Internal Name | Name | Theme |
| 0x42 | 0x17 | Urban 0 | Alien Twilight | Urban |
| 0x0A | 0x18 | Urban 1 | Windy City | Urban |
| 0x21 | 0x19 | Urban 2 | Forced Entry | Urban |
| 0x1A | Urban 3 | Desert | ||
| 0x1B | Urban 4 | |||
| 0x1A | 0x1C | Urban 5 | The Deadly Skyscrapers | Urban |
| 0x0B | 0x1D | Urban 6 | Sinister Sewers | Urban |
| 0x1E | Urban 7 | |||
| 0x1F | Urban 8 | |||
| 0x20 | Urban 9 |
Sky Group[]
| Level HEX ref | Map HEX ref | Internal Name | Name | Theme |
| 0x1C | 0x21 | Sky 0 | Skydragon Castle 2 | Sky |
| 0x40 | 0x22 | Sky 1 | Towers of Blood | Sky |
| 0x23 | Sky 2 | |||
| 0x24 | Sky 3 | |||
| 0x24 | 0x25 | Sky 4 | Wind Castles 1 | Sky |
| 0x25 | 0x26 | Sky 5 | Wind Castles 2 | Sky |
| 0x1B | 0x27 | Sky 6 | Skydragon Castle 1 | Sky |
| 0x28 | Sky 7 | |||
| 0x29 | Sky 8 | |||
| 0x2A | Sky 9 |
Mtn Group[]
| Level HEX ref | Map HEX ref | Internal Name | Name | Theme |
| 0x0F | 0x2B | Mtn 0 | Stormwalk Mountain | Mtn |
| 0x0E | 0x2C | Mtn 1 | Dragonspike | Mtn |
| 0x02 | 0x2D | Mtn 2 | Highwater Pass 1 | Mtn |
| 0x03 | 0x2E | Mtn 3 | Highwater Pass 2 | Mtn |
| 0x28 | 0x2F | Mtn 4 | The Nightmare Peaks 1 | Mtn |
| 0x34 | 0x30 | Mtn 5 | The Pinnacle | Mtn |
| 0x29 | 0x31 | Mtn 6 | The Nightmare Peaks 2 | Mtn |
| 0x36 | 0x32 | Mtn 7 | The Caged Beasts | Forest |
| 0x2D | 0x33 | Mtn 8 | Secrets In the Rocks | Mtn |
| 0x19 | 0x34 | Mtn 9 | Madmaze Mountain | Mtn |
Ice Group[]
| Level HEX ref | Map HEX ref | Internal Name | Name | Theme |
| 0x26 | 0x35 | Ice 0 | Blizzard Mountain | Ice |
| 0x3D | 0x36 | Ice 1 | Frosty Doom | Ice |
| 0x0D | 0x37 | Ice 2 | The Crystal Crags 2 | Ice |
| 0x32 | 0x38 | Ice 3 | The Final Marathon | Ice |
| 0x46 | 0x39 | Ice 4 | The Shimmering Caves | Ice |
| 0x2E | 0x3A | Ice 5 | Ice God's Vengeance | Ice |
| 0x2B | 0x3B | Ice 6 | Diamond Edge | Ice |
| 0x48 | 0x3C | Ice 7 | Sky Fortress | Sky |
| 0x0C | 0x3D | Ice 8 | The Crystal Crags 1 | Ice |
| 0x27 | 0x3E | Ice 9 | Caves of Ice | Ice |
Desert Group[]
| Level HEX ref | Map HEX ref | Internal Name | Name | Theme |
| 0x17 | 0x3F | Desert 0 | Hoverboard Beach | Isle |
| 0x18 | 0x40 | Desert 1 | Pyramids of Peril | Desert |
| 0x41 | 0x41 | Desert 2 | The Crypt | Desert |
| 0x47 | 0x42 | Desert 3 | The Crypt (leftover) | Desert |
| 0x43 | Desert 4 | |||
| 0x44 | Desert 5 | |||
| 0x45 | Desert 6 | |||
| 0x46 | Desert 7 | |||
| 0x39 | 0x47 | Desert 8 | The Forbidden Tombs | Desert |
| 0x38 | 0x48 | Desert 9 | The Crypt (leftover) | Desert |
Forest Group[]
| Level HEX ref | Map HEX ref | Internal Name | Name | Theme |
| 0x12 | 0x49 | Forest 0 | The Whispering Woods 2 | Forest |
| 0x00 | 0x4A | Forest 1 | Blue Lake Woods 1 | Forest |
| 0x01 | 0x4B | Forest 2 | Blue Lake Woods 2 | Forest |
| 0x11 | 0x4C | Forest 3 | The Whispering Woods 1 | Forest |
| 0x20 | 0x4D | Forest 4 | Woods of Despair 2 | Forest |
| 0x43 | 0x4E | Forest 5 | Tunnels Beneath the Woods | Forest |
| 0x1F | 0x4F | Forest 6 | Woods of Despair 1 | Forest |
| 0x50 | Forest 7 | |||
| 0x51 | Forest 8 | |||
| 0x52 | Forest 9 |
Hill Group[]
| Level HEX ref | Map HEX ref | Internal Name | Name | Theme |
| 0x3B | 0x53 | Hill 0 | The Valley of Life | Hill |
| 0x08 | 0x54 | Hill 1 | Hills of the Warrior 1 | Hill |
| 0x35 | 0x55 | Hill 2 | Hidden Canyon | Hill |
| 0x09 | 0x56 | Hill 3 | Hills of the Warrior 2 | Hill |
| 0x2F | 0x57 | Hill 4 | Beneath the Twisted Hills | Hill |
| 0x44 | 0x58 | Hill 5 | Hills of Forever | Hill |
| 0x31 | 0x59 | Hill 6 | The Land Below | Hill |
| 0x2C | 0x5A | Hill 7 | The Hills Have Eyes | Hill |
| 0x5B | Hill 8 | |||
| 0x23 | 0x5C | Hill 9 | Lion's Den | Hill |