Uniball

Spaceships playing a sort of soccer-like sport.

Free to play indefinitely.

Unification Wars

Unification Wars is a free online strategy game with over 350,000 members. You are the leader of your civilization, and your goal is to expand the power of your empire by diplomatic or military means.

Free, with option to pay for additional features.

Urban Dead

Make your way through derelict buildings and fend off the legions of the undead in this massively multiplayer zombie apocalypse.

Free to play indefinitely.

Urban Terror

Urban Terror can be described as a Hollywood tactical shooter; it is realistic to a certain extent, but the creators go by the motto "fun over realism."

Free to play indefinitely.