Cirque du Tournois Irréels

Mike Brinker has created a mod for Unreal Tournament where two teams of players fight each other in order to win a mission goal. Unlike most other FPS games however, there are no guns, and killing isn't required (or even possible) to complete the goals. Clownerstrike pits 2 teams of clowns against each other who compete for audience laughs using techniques as pie fights, human pyramids and other clown based combat.
Clownerstrike is a exploration into emergent behaviour where players are invited to solve problems in ways the games designer did not (and could not) predict. An example of emergent game play is given as the "human towers" which appeared in FPS games so people could get to areas on maps which the designer planned to be off limits.
Mike plans to lead the team into porting it to the Half-life2:Source engine to take advantage of its physics capabilities. He also hopes to use Clownerstrike as a thesis project for school.

- Clownerstrike

[Via. We Make Money Not Art]