Odamex is a free and open source port for the classic first-person-shooter Doom. Odamex's goal is to emulate the feel of and retain many aspects of the original Doom executables while offering a broader expanse of security features, personal configuration, gameplay options, and editing features. Odamex can run on a wide range of operating systems and hardware, so players should be able to play on almost any platform.

These are the features that make Odamex the multiplayer Doom port that is the closest to the original Doom:
• Out-of-the-box Standard Doom key bindings and settings for client and server
• Doom2.exe gameplay-related nuances have been reimplemented as standard
• Nuanced mouse code that replicates the precise feel of using the mouse in doom2.exe
• Demo playback support (recording coming soon) for both Doom LMP demos and a new, Odamex-specific demo format (LMP compatibility with doom2.exe is provided)
• Functional Deathmatch and Cooperative game modes, single player is also supported.