The following are known Code Breaker Codes for ICO on Sony Playstation 2 (PS2).

These codes are for the U.S. version of the game.

• Master Code – Must Be On
  FA7A006E 32B56ED1
• Press L1+Select To Save Game
  DA77D007 B25F884B
  1A8573A1 0000001C
• Air Walker
  EA5983A1 9828D6F5
  2A933EE4 03E00008
  2A9F3EE4 00000000
  EA5983BB 9828D6EF
  2A933EE4 27BDFF70
  2A9F3EE4 8F83A418
  Note: Press R1+Select to walk on air, and Press R2+Select for normal walk.
• Idiot AI
  2AAB3714 03E00008
  2A973714 00000000
  2A733D40 03E00008
  2A7F3D40 00000000