The Orange Box is a bundle that includes five titles from Valve: Half-Life 2; Half-Life 2:Episode 1; Half-Life 2: Episode Two; Team Fortress 2, the sequel to the game that put class-based, multiplayer team warfare on the map; and Portal, the game that blends puzzles, first person action, and adventure gaming to produce an experience like no other.
OS: Windows 7, Vista, XP
Processor: 1.7 Ghz
Memory: 512 MB RAM
Graphics: DirectX 8.1 level Graphics Card (requires support for SSE)
Storage: 6500 MB available space