Xonotic

Xonotic is an first-person arena shooter, forked from Nexuiz. The game runs on the Darkplaces engine, based on Quake 1's engine. Gameplay is also based on Quake (mainly the competitive Quake III Arena), but Xonotic adds some unique touches (for example, the rockets fired from a rocket launcher can be guided with mouse). The gameplay is very fast-paced, and includes and encourages a form of bunny hopping as well as rocket jumping (in Xonotic "laser jumping" is more common). The art is mostly futuristic, but unofficial maps exist in a variety of styles.

There are 16 different game modes (including the classics: deathmatch, team deathmatch and capture the flag, but including uncommon ones such as a type of football ), 16 weapons with secondary fires, 18 official maps (and a lot of unofficial maps), and a complex HUD editor that lets you tailor the HUD to your exact preference. There are also so called mutators, that allow to slightly modify rules of each game mode.

Xonotic features integrated player statistics. The XonStat system tracks a bunch of stats, including win/loss ratio, frag ratio and average accuracy.

History and Split from Nexuiz
The game started in 2002 by Lee Vermeulen and Forest ‘LordHavoc’ Hale, originally named Nexuiz, to be a Darkplaces-based free multiplatform arena shooter. The first version was released in 2005.

In 2010, the two original founders decided to make a deal with a company named IllFonic to create a proprietary remake of the game, which would use the same name, Nexuiz, and the domain nexuiz.com, without intentions to contribute back to the free version. This move created a big controversy and a very negative response of the Nexuiz community. Disputes over the code, which was developed under GPL, followed. As such, the game could not be closed-sourced without the permission of all contributors. This forced the developers to rewrite the game from scratch, in a proprietary CryENGINE3.

This led the community to formally announce a fork of the game that would continue to be developed as free and open-source. The new name was chosen to be Xonotic.