Alienwave
- Linux console shoot'em up where you control a space ship and must kill as more alien spaceships as you can.
- http://www.alessandropira.org/alienwave/aw.html

Supreme
- One to two player action/strategy space combat game for Windows.
- http://www.bit2logic.com/supreme.html

Saucer Attack
- Download of space shooter for Windows, in which players fly a red rocket-ship against waves of flying saucers.
- http://www.positech.co.uk/saucer/

Hornado
- Describes space-shooter for Windows similar to Katakis, with graphics, sounds, and 8 levels of enemies and bosses.
- http://www.hornado.de/english/

Gamma Patrol
- Old-style, vertical scrolling space-shooter for Linux. You have to fight your way through lots of enemies using different kinds of weapons. (Open Source)
- http://www.odahoda.de/avop/gammapatrol/

Maelstrom
- You pilot your ship through the dreaded "Maelstrom" asteroid belt, the deadliest stretch of space. Available on Linux, Windows, BeOS, or Mac. (Open Source)
- http://www.devolution.com/~slouken/projects/Maelstrom/

Hellfighter
- A fast action space combat simulation for Windows featuring network play, original music, and 3D graphics.
- http://www.dracova.com/hellfighter/

Epiar
- A space arcade shooter for Linux and Windows. (Open Source, GPL)
- http://epiar.net/

Ain
- Space shooter for Windows that has AI for six ships. [Open Source, GPL]
- http://ain.sourceforge.net/