How to Unlock All Missions:
Cheat Codes:
Access Developer’s Dorm: up, circle, x, left, triangle, triangle
Unlock Alien Mission: square, circle, left, left, triangle, x, right, right
Mystery Code: up, triangle, up, triangle, up, triangle, square, circle, right
Download Decay PC Port:
Download Decay for Sven Co-op: :decay
Hidden Cheat Code Locations in Half-Life (PS2):
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0:00 Intro
0:32 1 - The Secret Chumtoad
1:34 2 - Tell Simon He’s Fired
2:12 3 - The Developer’s Dorm Room
3:05 4 - S
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