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

These codes have been collected from around the web and all credit goes to the original poster of the code. Notes associated with any code may be written by the original code creator. Some notes have been added or modified from their original source.

Do you know any additional codes for this game? Is there an error listed above? Let us know about it and we’ll update the list.


Code Indexes for Sony Playstation 2 (PS2)

• Action Replay Index for Sony Playstation 2 (PS2)
• Action Replay MAX Index for Sony Playstation 2 (PS2)
• CodeBreaker Index for Sony Playstation 2 (PS2)
• GameShark (Version 1 & 2) Index for Sony Playstation 2 (PS2)

Want an Action Replay for Sony Playstation 2 (PS2)? Click here to find it on Amazon!

Other Content for Half-Life

• Half-Life Game Index
• Action Replay MAX Codes [US]
• GameShark Codes