Half-Life 2 Codes:
While playing enter one of the following codes.
| Up Up Down Down Left Right Left Right O Button X Button | Restore Health By 25 Points |
| Triangle, O, X, Square, RI,Triangle, Square, X, O, RI | Restores ammo for current weapon |
Half-Life 2 - Alternate title screen:
Beat Half-Life 2 once and a different background will be used on the main menu.
Portal Codes:
While playing enter one of the following codes.
| Down, O, X, O, Triangle, Down, O, X, O, Triangle | Create A Cube |
| Left, Left, Left, Left, L1, Right, Right, Right, Right, R1 | Unlock All Levels |
Different Portal Main Menu:
Beat portal once and a different background will be used on the main menu.