Clanwar
A clanwar is a Jazz Jackrabbit 2 match between two clans, usually in a team-based gametype such as CTF, Team Battle or Assault. Both clans form a team, usually consisting of 2 to 4 players, that tries to beat the other team by winning the game.
In the past there have been several tournaments based on clanwars. The most succesfull tournament to date is JJ2WC.