Codes:
While playing enter one of the following codes
Restore Health By 25 Points
Up Up Down Down Left Right Left Right O Button X Button
Restores ammo for current weapon
Triangle, O, X, Square, RI, Triangle, Square, X, O, RI
Different Portal Main Menu:
Beat portal once and a different background will be used on the main menu.
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.
| Code | Effect |
|---|---|
| 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 |
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