PEAK Wiki - Maps
Caldera
One of the game's original confirmed biomes, being cycled out of rotation specifically in favor of The Gloom with the arrival of The Final Ascent update.
The Kiln
One of the game's original confirmed biomes, being cycled out of rotation specifically in favor of The Citadel with the arrival of The Final Ascent update.
The Gloom
A confirmed new biome arriving in The Final Ascent update -- a fog-covered swamp, playable only back-to-back with The Citadel rather than being randomly connected like other biomes.
The Citadel
A confirmed new biome arriving in The Final Ascent update -- a fully vertical tower biome packed with ladders, traps, and hazards, playable only back-to-back with The Gloom.