UFO: Alien Invasion is a strategy game featuring turn-based tactical combat against hostile alien forces (human or computer controlled) which are infiltrating earth at this very moment. You are in command of a small special unit which has been founded to face the alien strike force. To be successful in the long run, you must research the alien technology in order to build bigger and better weapons against your foes.

Packages are available for the following releases:
Ubuntu 13.10: 2.4-1~getdeb2~saucy
Ubuntu 11.04: 2.3.1-1~getdeb1
Ubuntu 9.04: 2.2.1-0~getdeb1
Ubuntu 11.10: 2.4-1~getdeb1
Ubuntu 14.04: 2.4-1~getdeb2~saucy
Ubuntu 12.04: 2.4-1~getdeb1
Ubuntu 9.10: 2.2.1-1~getdeb2
Ubuntu 12.10: 2.4-1~getdeb1
Ubuntu 10.10: 2.3.1-1~getdeb1
Ubuntu 10.04: 2.3.1-1~getdeb1
Ubuntu 13.04: 2.4-1~getdeb1

Package downloads per version:
Version 2.2.1: 0
Version 2.3.1: 329
Version 2.4: 4975

Uninstall the application with the following command:
sudo apt-get remove ufoai