How do I unlock the 5th map?
Bio Lab is the fifth arena in 1.0 and has one direct prerequisite: finish Dead Terminal on Default.
Quick Answer
Complete a Dead Terminal run in Default mode. The official 1.0 changelog says Bio Lab unlocks after completing Dead Terminal on Default; clearing a different map or a different mode does not satisfy that stated requirement.
Steps
- Unlock Dead Terminal through the normal map progression if it is not available yet.
- Select Dead Terminal and choose Default mode.
- Complete the run, then return to area selection and choose Bio Lab.
Requirements / Limits
- Dead Terminal must be the arena and Default must be the mode.
- The official changelog does not state a minimum difficulty level beyond that mode requirement.
- Bio Lab's decontamination zone and circular boundary are map hazards, not unlock steps.
Common Mistakes
- Completing Hardcore or Endurance on Dead Terminal and assuming any clear counts.
- Following 2025 posts that describe the fifth slot as unreleased.
- Confusing the Bio Lab leaderboard selector fix in 1.0.0b with the map's unlock condition.
Sources Checked
- Developer changelog · accessed 22 August 2026Full Release — Version 1.0
Developer changelog, 20 August 2026. Gives the Ranger, Bio Lab, Boss Rush, mission, map and Infinite unlock details used here.
- Developer changelog · accessed 22 August 2026Yet Another Content Update 0.9
Developer update, 18 September 2025. Adds Dead Terminal and splits Endless into Endurance and Infinite.
- Developer guide · accessed 22 August 2026Official Troubleshooting Guide
Developer-authored guide. Documents manual aim, map/mode unlock logic and the three-tier weapon path.
- Developer changelog · accessed 22 August 2026Yet Another Update 1.0.0b (Hotfix)
Developer hotfix, 21 August 2026. Latest public patch checked; it changes fixes and mission handling, not the unlock rules on these pages.