Wolfenstein: Enemy Territory is a free multiplayer FPS set during World War II.

Packages are available for the following releases:
Ubuntu 13.10: 2.60b+pb2.213-1~getdeb2
Ubuntu 11.04: 2.60b+pb2.213-1~getdeb1
Ubuntu 9.04: 2.60b-1~getdeb2
Ubuntu 11.10: 2.60b+pb2.213-1~getdeb1
Ubuntu 14.04: 2.60b+pb2.213-1~getdeb2
Ubuntu 12.04: 2.60b+pb2.213-1~getdeb2
Ubuntu 9.10: 2.60b-1~getdeb3
Ubuntu 12.10: 2.60b+pb2.213-1~getdeb2
Ubuntu 10.10: 2.60b+pb2.213-1~getdeb1
Ubuntu 10.04: 2.60b+pb2.213-1~getdeb1
Ubuntu 13.04: 2.60b+pb2.213-1~getdeb2

Package downloads per version:
Version 2.60b: 55
Version 2.60b+pb2.213: 6649

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