Cube 2: Sauerbraten

Sauerbraten (a.k.a. Cube 2) is a free multiplayer/singleplayer first person shooter, built as a major redesign of the Cube FPS.

Much like the original Cube, the aim of this game is not necessarily to produce the most features & eyecandy possible, but rather to allow map/geometry editing to be done dynamically in-game, to create fun gameplay and an elegant engine.

The engine supporting the game is entirely original in code & design, and its code is Open Source (ZLIB license, read the docs for more on how you can use the engine).

Cube 2: Sauerbraten is similar to:

Doom, Half–Life, Quake

Cube 2: Sauerbraten is used for:

first-person shooter, FPS, game

Who uses Cube 2: Sauerbraten:

gamer, home user

Created by:

http://dot3labs.com/

Other tags:

3D Rendering, Codec, Editors, First Person Shooters, FPS, game, Telecommunications Industry

Features:

Old school, fast, and intense gameplay, similar to Doom 2 and Quake 1.
Many multiplayer gameplay modes, most in teamplay variants as well: DeathMatch, InstaGib, Efficiency, Tactics, Capture -- domination and battlefield style, CTF, coopedit (cooperative multiplayer editing over a server).
Master server and in-game server browser.
Lag-free gameplay experience.
Two singleplayer modes: DMSP (SinglePlayerDeathMatch), classic SP (progression driven SP like other games)
7 weapons tuned for maximum satisfaction: shotgun, rocket launcher, machine gun, rifle, grenade launcher, pistol, chainsaw.