Route and failure check
Use Body Slam, high Physical, or another single-hit payoff instead of spreading damage.
Achievements
Everything is Crab Ultrabonk Achievement Guide
Deal 500 or more damage with a single hit in a run.
Ultrabonk achievement quick answer
Ultrabonk needs 500 or more damage in one eligible hit, but recent public evidence shows players still need to check the Codex mode tag before trusting the number alone.
If the Codex requirement points to Pressure runs, the hit must land before the run converts into Extinction or Endless.
Use Body Slam, high Physical scaling, or another dedicated one-hit payoff rather than a damage-over-time shell.
Recommended pages: Chonk Body Slam, Physical Predator.
Recommended builds
Evidence and verification
The links below support specific dated claims, mechanics, or player-route observations on this page; after a patch, use the current in-game text for exact values.