絕地要塞
The Orange Box is a video game compilation containing five games developed by Valve. Two of the games included, "Half-Life 2" and its first stand-alone expansion, ', had previously been released as separate products. Three new games were also included in the compilation: the second stand-alone expansion, ', the puzzle game "Portal", and "Team Fortress 2", the multiplayer game sequel to "Team Fortress Classic". Valve also released a soundtrack containing music from the games within the compilation. A separate product entitled "The Black Box" was planned, which would have included only the new games, but was later canceled.