Cheat Mode:
Press Tab then enter one of the following codes at the chat window.

Code                  Effect  
eh                    God mode
addall                All weapons and spells   
assall                Spawn donkey joke   
infinitemana <0 or 1> Toggle unlimited mana   
becomelight <0 or 1>  Toggle extra light   
set aeons.patrick health 999 Set health to 999  
set aeons.patrick mana 999   Set mana to 999
flight                Flight mode   
showfps               Display frame rate   
ampattspell           Increase selected spell level
Start (map name)      Level select (see below)
behindview1           3rd person perspective
slowmo (1-5)          Slow motion

Aeons
Catacombs_Cisterns
Catacombs_Cliffs
Catacombs_Entrance
Catacombs_Exit
Catacombs_Exit_After
Catacombs_LairOfLizbeth
Catacombs_LairOfLizbethPostCU
Catacombs_LowerLevel
Catacombs_SaintsHall
Catacombs_Tunnels
Catacombs_WellRoom
Catacombs_WindChamber
CU_01
CU_02
CU_03
CU_04
CU_05
CU_06
CU_07
CU_08
CU_09
CU_10
CU_11
CU_12
CU_13
Entry
EternalAutumn_FinalFight_Arch
EternalAutumn_FinalFight_Arena
EternalAutumn_FinalFight_ArenaBattle
EternalAutumn_FinalFight_Ruins
EternalAutumn_Ravines_Airie_Interior
EternalAutumn_Ravines_Bridge
EternalAutumn_Ravines_Chase
EternalAutumn_Ravines_Chieftain
EternalAutumn_Ravines_Forest
EternalAutumn_Transition
EternalAutumn_Waterfall_Dwellings_Lower
EternalAutumn_Waterfall_Dwellings_Upper
EternalAutumn_Waterfall_Gauntlet
Grounds_Cottage
grounds_dock_night
Grounds_Lighthouse
Grounds_Mausoleum_Approach
Grounds_Mausoleum_Entrance
Grounds_Mausoleum_Tunnels
Grounds_OldCemetery
Manor_CentralLower
Manor_CentralLower_After
Manor_CentralLower_night
Manor_CentralLower_storm
Manor_CentralUpper
Manor_CentralUpper_After
Manor_CentralUpper_PostOneiros
Manor_CentralUpper_storm
Manor_Chapel
Manor_Chapel_night
Manor_Crypt
Manor_EastWingLower
Manor_EastWingLower_After
Manor_EastWingLower_night
Manor_EastWingUpper
Manor_EastWingUpper_After
Manor_EastWingUpper_night
Manor_EntranceHall
Manor_EntranceHall_FromKitch
Manor_EntranceHall_Intro
Manor_EntranceHall_Night
Manor_EntranceHall_night_ReturnfromCove
Manor_EntranceHall_Storm
Manor_EntranceHall_ToKitch
Manor_FrontGate
Manor_FrontGate_night
Manor_FrontGate_Night_Return
Manor_Gardens
Manor_Gardens_night
Manor_Gardens_storm
Manor_GreatHall_night
Manor_GreatHall_Storm
Manor_InnerCourtyard
Manor_InnerCourtyard_Storm
Manor_NorthWingLower
Manor_NorthWingLower_After
Manor_NorthWingLower_night
Manor_NorthWingLower_storm
Manor_NorthWingUpper
Manor_NorthWingUpper_night
Manor_NorthWingUpper_PostOneiros
Manor_NorthWingUpper_storm
Manor_PatricksRoom
Manor_TowerRun_night
Manor_TowerRun_storm
Manor_WestWing
Manor_WestWing_Hall1
Manor_WestWing_Night
Manor_WidowsWatch_storm
Monastery_Past_Church
Monastery_Past_Exterior
Monastery_Past_Interior
Monastery_Past_LivingQuarters
Monastery_Present_Church
Monastery_Present_Cove
Monastery_Present_Entrance
Monastery_Present_InnerSanctum
Monastery_Present_Tunnels
Oneiros_Amphitheater
Oneiros_City1
Oneiros_City2
Oneiros_HowlingWell
Oneiros_Intro
Oneiros_Oracle
Oneiros_RetreatBath
Oneiros_RetreatExterior
Oneiros_RetreatSecondFloor
Oneiros_RetreatStudio
Oneiros_ZigguratInterior
Oneiros_ZigguratLower
Oneiros_ZigguratUpper
PiratesCove_Barracks
PiratesCove_Exterior
PiratesCove_Pier
PiratesCove_Pool
PiratesCove_TreasureRoom
playground
SmokeTest
StandingStones_FirstVisit
StandingStones_KingFight 

 

Thanks to Revolution reader Jeracia and Bo!