Rage!

Zandronum is a multiplayer oriented port, based off Skulltag, for Doom and Doom II by id Software.

Bulletstorm focuses on combat, both with firearms and melee attacks. There are a variety of fictional firearms available, although the game also places heavy emphasis on kicking enemies and using the energy leash.

The Hammer of Thyrion project is a cross-platform source port effort of Raven Software's Hexen.

The game begins in 1923, after World War I veteran Patrick Galloway receives an urgent letter from his friend Jeremiah Covenant. Covenant, well aware of Galloway's reputation for dealing with occult matters, is in failing health and raves about a curse that has destroyed his entire family. Galloway travels to the Covenant estate on the coast of Ireland to visit his friend, who relates an outlandish tale of supernatural terrors.

Freedoom is a free first-person shooter under continuous development. The Freedoom project aims to create a complete free content game based on the Doom engine. Combined with the engine, Freedoom is also compatible with game modifications made for the original Doom games, made by Doom fans and artists over the decades.

Aliens vs. Predator is a science fiction first-person shooter video game, developed by Rebellion Developments

Ballistic Overkill is a fast paced PvP shooter. Easy pick up and play, no complicated setups or rules: it’s kill or be killed! Select a class with unique skills and arsenal to play. No wimpy classes. In Ballistic, everyone is a killer!

Cross Fire is a free online first-person shooter featuring persistent rankings and five game modes – including the exclusive stealth-action Ghost Mode.

Survive the Wasteland as Mad Max, completing treacherous missions and scavenging for supplies to build the ultimate combat vehicle.

Warface is a free-to-play online first-person shooter developed by Crytek Kiev and co-produced by Crytek Seoul and Crytek Frankfurt with Crytek UK developing the Xbox 360 port.