All Difficulty Modes
D2CT-CADY Game clock runs faster
SACT-CADY Game clock runs slower
8ACT-CADY Game clock runs much slower
AACT-CA6J Game clock frozen (no time limit)
AJBT-AAEY Start at stage 2 instead of stage 1
ANBT-AAEY Start at stage 3
ATBT-AAEY Start at guardian level after stage 3
AYBT-AAEY Start at stage 4
A2BT-AAEY Start at stage 5
A6BT-AAEY Start at stage 6
BABT-AAEY Start at guardian level after stage 6
BEBT-AAEY Start at stage 7
BJBT-AAEY Start at stage 8
BNBT-AAEY Start at stage 9
BTBT-AAEY Start at guardian level after stage 9
BYBT-AAEY Start at stage 10
B2BT-AAEY Start at stage 11
B6BT-AAEY Start at stage 12
CABT-AAEY Start at guardian level after stage 12
CEBT-AAEY Start at stage 13
CJBT-AAEY Start at stage 14
CNBT-AAEY Start at stage 15
CTBT-AAEY Start at guardian level after stage 15
AJNA-EA3R Infinite ammo for machine gun
AJMA-EA7C Infinite fuel for flame-thrower
AJJT-EA2J Infinite ammo for grenade launcher
AJKA-EA88 Infinite hand grenades
M42A-CAG0 Machine gun recharge pick-up reloads to capacity
NC2A-CAHY Flame-thrower recharge pick-up reloads to capacity
NL2T-CAAW Grenade launcher recharge pick-up reloads to capacity
NW2T-CABT Hand grenade recharge pick-up reloads to capacity
RG2T-C6W4 First-aid pick-up restores energy gauge to capacity
AMDA-CA4J Long falls do not reduce energy
ADEA-CAGJ Falls into turbine fans do not reduce energy
AJFT-AA66 Never lose radar
A2EA-AA8R Infinite lives
5DXA-D93N Ripley jumps higher
YDXA-D93N Ripley jumps much higher
Hard Difficulty Mode
LBRT-JAEJ Machine gun capacity is 50 instead of 99
GBRT-JAEL Flame-thrower capacity is 30 instead of 99
EBRT-JAEN Grenade launcher capacity is 20 instead of 99 E
GBRT-JAER Hand grenade capacity is 30 instead of 99
