Arena
The fourth arena and the busiest one for unlocks: a second boss (Hypnomancer), a full-exploration reward (Multiheal) and a final boss that grants the Kill Zone weapon.
- Unlock order
- 4
- How to unlock
- Defeat the first boss in Corridor
Database
Arenas
The 6 survival arenas in unlock order: Catacombs, Pit, Corridor, Boiler, Tombs and Flood.
6 of 6 arenas
Arena
The starter arena. Its first boss opens the way to the Pit, and its final boss guards the Decoy weapon.
- Unlock order
- 1
- How to unlock
- Available from the start
Arena
The third arena, unlocked by beating the Pit's first boss. Its final boss unlocks the Krug character.
- Unlock order
- 3
- How to unlock
- Defeat the first boss in Pit
Arena
The sixth and final arena. Fully exploring it unlocks Crystalize, and its final boss — beaten by fewer than 1% of players — unlocks the Battery item.
- Unlock order
- 6
- How to unlock
- Defeat the first boss in Tombs
Arena
The second arena, unlocked by beating the Catacombs' first boss. Its final boss unlocks the Murderist character.
- Unlock order
- 2
- How to unlock
- Defeat the first boss in Catacombs
Arena
The fifth arena, unlocked by beating the Boiler's first boss. Its final boss unlocks the Procrastinator item.
- Unlock order
- 5
- How to unlock
- Defeat the first boss in Boiler