http://www.xbox.com/en-US/support/systemuse/xbox360/gameplay/discreplacement-games.htmwebsite to get your disc's replaced from Microsoft.

Orange Box (yes, i know its a shooter, but i never played episode one or two, and its also got a 3rd person multiplayer game and a really cool looking puzzle game)ender1601

What 3rd person shooter is included in The Orange Box?