Linux
Business Model Freeware / Free-to-play / Public Domain
Minimum CPU Class Required Intel Dual-Core
Minimum RAM Required 1 GB
Media Type Download
Drivers/APIs Supported Attribute Image OpenGL
Sound Capabilities OpenAL
Input Devices Supported Keyboard, Mouse
Multiplayer Options Internet
Number of Players: Offline 1 Player
Number of Players: Online 24 Players
Multiplayer Game Modes Bots, Free-for-all / One-on-one, Team
Miscellaneous Attributes Cross-platform Play, Permanent Internet connection required
Steam Achievements, Cloud, Cross-platform, DLC available, Leaderboards, Steam account required, Steamplay, Trading cards, Valve Anti-Cheat System (VAC), Workshop
Notes 15 GB available space required.

Macintosh
Business Model Freeware / Free-to-play / Public Domain
Minimum OS Class Required Mac OS X 10.5.8
Minimum RAM Required 1 GB
Media Type Download
Input Devices Supported Keyboard, Mouse
Multiplayer Options Internet
Number of Players: Offline 1 Player
Number of Players: Online 24 Players
Multiplayer Game Modes Bots, Free-for-all / One-on-one, Team
Miscellaneous Attributes In-app purchases
Steam Achievements, Cloud, Cross-platform, DLC available, Leaderboards, Steam account required, Steamplay, Trading cards, Valve Anti-Cheat System (VAC), Workshop
Notes 15 GB available space required.

Windows
Business Model Commercial
Minimum CPU Class Required Pentium 4
Minimum OS Class Required Windows 2000
Minimum RAM Required 512 MB
Media Type Download, DVD-ROM
Minimum DirectX Version Required DirectX 8.0
Drivers/APIs Supported Direct3D
Video Modes Supported Full screen, SVGA/XGA (1024*768), SVGA/XGA (640*480), SVGA/XGA (800*600), SXGA (1280*1024), SXGA- (1280*960), Window, WSXGA/WXGA+ (1440*900), WUXGA (1920*1200), WXGA (1280*720), WXGA (1280*768), WXGA (1280*800), XGA+ (1152*864)
Input Devices Supported Keyboard, Mouse
Multiplayer Options Internet, LAN
Number of Players: Online 24 Players
Multiplayer Game Modes Co-Op, Team
Miscellaneous Attributes 3D Accelerator Required, Multiple players required
Notes Business model changed to Free 2 Play per June 23, 2011


Technical information contributed by Pixelspeech (1006), Foxhack (16460), formercontrib (159906), Yearman (22832) and Sicarius (61892)