

The levels background themes are all related to Valve games Half Life 2, Portal, Team Fortress 2 and Counter-Strike: Source (even though it isn't part of The Orange Box), and voices for each level are from their respective Valve game. The game has 10 levels which are unique to this version of Peggle and not included in the full version of the game. PopCap Games released Peggle Extreme, a shorter version of Peggle, with The Orange Box on the PC. Overview An example of the Valve themed levels to the game.
