How do the Boss Rush leaderboards work?
Placement is not a run-time score. The developer ties it to how fast the Final Boss dies.
Quick Answer
In Boss Rush the run starts as usual, but you are racing the clock to get as powerful as you can before the tenth-minute mark, when the area's Final Boss spawns. The developer states that the faster you kill that enemy, the higher you place, and that the leaderboards exist for each arena and each difficulty level. Placements are therefore not pooled into one global table.
Steps
- Unlock Boss Rush on the arena you want by completing Hardcore mode there.
- Spend the opening ten minutes getting as powerful as you can. The developer describes the run as starting normally, with the player racing the clock before the spawn.
- Kill the Final Boss as fast as possible once it spawns at the tenth-minute mark.
- Check the leaderboard for that arena and that difficulty level, not a combined one.
Requirements / Limits
- Leaderboards are split per arena and per difficulty level, so a strong placement on one arena says nothing about another.
- Bio Lab was not selectable in the leaderboards until 1.0.0b fixed it.
- The developer publishes the ranking principle — faster kill, higher place — and not the scoring formula behind it.
- Boss Rush is unlocked per map, so the leaderboard for an arena is only reachable after that arena's Hardcore clear.
Common Mistakes
- Comparing a placement against someone who ran a different difficulty level.
- Looking for Bio Lab in the leaderboard selector on 1.0 or 1.0.0a, where the entry was missing.
- Rushing the opening ten minutes. The developer describes that window as the time to get powerful, not a phase to skip.
- Assuming total run time is the score. What the developer ties placement to is how fast the Final Boss dies.
Sources Checked
- Developer changelog · accessed 23 August 2026Full Release — Version 1.0
Developer changelog, 20 August 2026, re-read in full on 23 August 2026 for the Camp, mission, Friendship, Torment and achievement entries.
- Developer changelog · accessed 23 August 2026Yet Another Update 1.0.0b (Hotfix)
Developer hotfix, 21 August 2026, the latest public patch, re-read in full on 23 August 2026 for the Display-tab cursor toggle, the interface framerate limit and the mission objective tuning.