nInvaders 0.1.2

Ever wanted to play space invaders when you can't find a GUI? Now you can!

Teeworlds 0.7.0

Teeworlds is a multiplayer online shooter with a distinct 2D/retro look. It's available cross-plattform. Apart from Capture The Flag or Team Deathmatch provides other and custom modes as well as maps.

Galaxy Forces V2 1.85

Galaxy Forces V2 is a classic 2D side-scrolling game inspired by Gravity Forces on Amiga. It allows up to 8 players, involves shooting enemy space ships and either transporting cargo, point races against opponents, or shoot-everything scoring. There are 50 official levels and a map editor, and it runs on Linux, Windows and Mac.

SkullRush 0.4.0

SkullRush is a online multiplayer shooter in a 2D platform world. The client can be largely customized, new maps added, as the game server manages most graphics, sound and interactions.

XLennart 1.0

XLennart is an adaption of the well known XBill game. The virtual antagonists of this point-and-shoot game are running around sabotaging a working computer network to install a virus disguised as init system. The threat can be ended by squashing the intruders per mouse click, before all systems become inoperable. The game GUI requires Motif or Athena X11 libraries to be present, possibly also has an unneeded dependency on systemd.

Seagull Soup 1.07

Seagull Soup is a simple shooter game with joystick support. It utilizes SDL and works on Linux, Windows, BSD, Mac OS X. According to the source code there are seagulls, cannons and a whale involved.