Bisounours Party is meant to be a fun mod settled in a colorful universe with various fast paced gamemodes such as Deathmatch, Team Deathmatch, Capture The Flag and more fun gamemodes such as Coop, Sourceforts-like...
The game himself is really good and feel a little like Half-life 2 Deathmatch (but easier to play). Too bad the servers are now empty so just take a friend with you and go play !