Surprise! Without any warning or mention from the developer, two sets of downloadable content for Spelunky appeared on Xbox Live Arcade today.
The Explorers DLC expands your options when choosing an explorer to take into adventure or deathmatch mode. The pack adds eight new explorers, including the Eskimo, the Robot, the Viking, the Round Girl, the Round Boy, the Cyclops, the Ninja and the Golden Monk.
The Arenas DLC, simply enough, adds 24 new arenas to the rotation for deathmatch mode.