Alien 3.
 No.  Code  Effect
Codes 1 to 38 work on all difficulty modes.
   1  D2CT-CADY  Game clock runs faster
   2  SACT-CADY  Game clock runs slower
   3  8ACT-CADY  Game clock runs much slower
   4  AACT-CA6J  Game clock frozen (no time limit)
   5  AJBT-AAEY  Start at stage 2 instead of stage 1
   6  ANBT-AAEY  Start at stage 3
   7  ATBT-AAEY  Start at guardian level after stage 3
   8  AYBT-AAEY  Start at stage 4
   9  A2BT-AAEY  Start at stage 5
 10  A6BT-AAEY  Start at stage 6
 11  BABT-AAEY  Start at guardian level after stage 6
 12  BEBT-AAEY  Start at stage 7
 13  BJBT-AAEY  Start at stage 8
 14  BNBT-AAEY  Start at stage 9
 15  BTBT-AAEY  Start at guardian level after stage 9
 16  BYBT-AAEY  Start at stage 10
 17  B2BT-AAEY  Start at stage 11
 18  B6BT-AAEY  Start at stage 12
 19  CABT-AAEY  Start at guardian level after stage 12
 20  CEBT-AAEY  Start at stage 13
 21  CJBT-AAEY  Start at stage 14
 22  CNBT-AAEY  Start at stage 15
 23  CTBT-AAEY  Start at guardian level after stage 15
 24  AJNA-EA3R  Infinite ammo for machine gun
 25  AJMA-EA7C  Infinite fuel for flame-thrower
 26  AJJT-EA2J  Infinite ammo for grenade launcher
 27  AJKA-EA88   Infinite hand grenades
 28  M42A-CAG0  Machine gun recharge pick-up reloads to capacity
 29  NC2A-CAHY  Flame-thrower recharge pick-up reloads to capacity
 30  NL2T-CAAW    Grenade launcher recharge pick-up reloads to capacity  
 31  NW2T-CABT  Hand grenade recharge pick-up reloads to capacity
 32  RG2T-C6W4  First-aid pick-up restores energy gauge to capacity
 33  AMDA-CA4J  Long falls do not reduce energy
 34  ADEA-CAGJ  Falls into turbine fans do not reduce energy
 35  AJFT-AA66  Never lose radar
 36  A2EA-AA8R  Infinite lives
Codes 37 and 38 sometimes enable Ripley to jump through walls and ceilings.
Be careful though, because she can get stuck in ceilings or walls or get
trapped forever if there's no room on the other side. If this happens, reset!
 37  5DXA-D93N  Ripley jumps higher
 38  YDXA-D93N  Ripley jumps much higher
Codes 39 to 42 only work on Hard difficulty mode.
 39  LBRT-JAEJ  Machine gun capacity is 50 instead of 99
 40  GBRT-JAEL  Flame-thrower capacity is 30 instead of 99
 41  EBRT-JAEN  Grenade launcher capacity is 20 instead of 99
 42  GBRT-JAER  Hand grenade capacity is 30 instead of 99