The Thieves' Arena is the second arena in Castle Crashers and is populated by the Thief enemy.
The Thieves' Arena can be very difficult for low level characters. The Thieves seem to enjoy firing arrows at the player en masse effectively preventing the player from standing up long enough to get an attack in. An effective strategy for beating this arena is to use a character with access to sandwiches. While in "beefy" form, arrows no longer cause the player character to fly backwards, thus allowing combos to be successfully completed. Completing all ten waves during an offline campaign unlocks the Thief character. During a one-on-one match here, a camel will appear in the arena for a player to ride.
- The banner above the entrance to the arena says "Can't we just talk about this?"