SpaceCombat is an open source PC game
SpaceCombat is an open source PC game. It's a single player space simulation. Similar (commercial) games were TIE Fighter and Freespace. When you liked these games, you will love SpaceCombat.
Notes:
It's recommended to play the game with a joystick.
When you run the game the first time, it will check the internet (souceforge.net) for the complete package (about 500MB). So, take a break, drink some coffee, speak to your mate...
Once this download is finished, you can play the game. Later on, it will check once a week for updates. (You may prevent this by modifying the file "data/options.xml".)