Half-LIfe 2: The Orange Box While playing enter one of the following codes. Code                                         Effect 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. 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 Different Portal Main Menu: Beat portal once and a different background will be used on the main menu.