Cheats for Half-Life 2 on Xbox.
While playing the game enter one or more of the following button combinations to unlock the corresponding cheat:
Left, Left, Left, Left, Black, Right, Right, Right, Right, White.
Unlock all levels/chapters.
Up, Up, Down, Down, Left, Right, Left, Right, B, A.
Spawn a medkit.
Y, B, A, X, White, Y, X, A, B, White.
Spawn ammo for your current weapon.