Action Replay Codes [US]

The following are known Action Replay Codes for Half-Life on Sony Playstation 2 (PS2). These codes were also known as GameShark Codes and in most cases will work on both devices.

Device Compatibility: Action Replay & GameShark (Version 1 & 2)

Master Code – Must Be On
EC8783A8 1431D934

Xen Gravity Cheat
4CA57342 1456F025

Invincibility Cheat
4CA5735A 1456F025

Inf Ammo Cheat
4CA57372 1456F025

Invisibility Cheat
4CA5738A 1456F025

Slow Motion Cheat
4CA573A2 1456F025

Alien Mode Cheat
4CA573BA 1456F025

Action Replay MAX Codes [US]

The following are known Action Replay MAX Codes for Half-Life on Sony Playstation 2 (PS2).

Device Compatibility: Action Replay MAX

Master Code – Must Be On
A3V1-Q6CC-ZCV0C
HCD2-JJER-G9FAH
CDHD-NJDK-7661E

Xen Gravity Cheat
H1HC-0ANF-DWM1D
PAD2-DZG7-N6WF4
This is a built-in game cheat

Invincibility Cheat
8X57-1GUB-NV5Q8
Z4VB-NNT2-MNNN0
This is a built-in game cheat

Infinite Ammo Cheat
A0XR-58FK-E6NGK
VMX1-MRCB-Z1TEX
This is a built-in game cheat

Invisibility Cheat
GP89-DRWU-2PEY8
RT20-RHBZ-FG0HT
This is a built-in game cheat

Slow Motion Cheat
4TB7-736N-75NB1
CFAZ-20EY-YUKTJ
This is a built-in game cheat

Alien Mode Cheat
RT84-1W9Z-159HN
M1GB-HC7K-4V7N5
This is a built-in game cheat

GameShark Codes

The following are known GameShark Codes for Half-Life on Sony Playstation 2 (PS2).

• Master Code – Must Be On
  EC8783A8 1431D934
• Unlock Alien Mode
  4CA573BA 1456F025
• Unlock Infinite Ammo
  4CA57372 1456F025
• Unlock Invincibility
  4CA5735A 1456F025
• Unlock Invisibility
  4CA5738A 1456F025
• Unlock Slow Motion
  4CA573A2 1456F025
• Unlock Xen Gravity
  4CA57342 1456F025