This game is also available on PC.
Retro Game Cheats for Portal (Xbox 360)
Effect: Fire Rocket Projectile
Effect: Create Box
Effect: Fire Energy Ball
Effect: Portal Placement Anywhere
Effect: Portalgun ID 0
When:
during game
How:
press Up, Left, Down, Right, Up, Left, Down, Right, Y, Y
Submitted By:
Effect: Portalgun ID 1
When:
during game
How:
press Up, Left, Down, Right, Up, Left, Down, Right, X, X
Submitted By:
Effect: Upgrade Portalgun
Effect: Portalgun ID 2
When:
during game
How:
press Up, Left, Down, Right, Up, Left, Down, Right, A,A
Submitted By:
Effect: Portalgun ID 3
When:
during game
How:
press Up, Left, Down, Right, Up, Left, Down, Right, B, B
Submitted By: