X-Demo's favorite Devastation arena :). In a series of rounds, two teams try to destroy the other team and/or attempt to reach the other team's safe zone.
No_Remorse has been hard at work creating new bases for us to base duel in. It's quite refreshing playing these new bases.
BD, BDC, BDD arenas are quite popular as well.
Inspired by ExtremeGames's BD, we set up a base dueling arena with EG settings that's proven quite popular.
In this arena, two teams try to control a base's flag for a total of 5 minutes per round. The team that wins two of the three rounds wins the match.
A favorite among many Subspace/Continuum players, this arena applies the mechanics of hockey to the gameplay of Subspace/Continuum.
Goball's Golf arena. Like Hockey, but it uses the mechanics of golf instead. This arena has been proven pretty popular :).
One player is picked to draw a secret word using colored mines while the other players try to guess what the secret word is.
In this warzone-style flagging arena, the first team to have all 5 flags dropped wins.
This is a Trench Wars "pub" (main arena) inspired arena. We have 20 bots set up here, 5 for each main team fighting over the flags in the flag room and the rest sparring in the middle.
There are a ton of other arenas with various settings. Homages to other games like Command & Conquer (cnc). Racing arenas (bdrace, frograce), base duel arenas with Star WarZone settings (bdswz) or RedStar settings (bdrs).