Route and failure check
Build 50,000 eligible total damage before leaving the required Pressure mode: use broad AoE, enough enemy density, and one finished scaling family rather than chasing a single giant hit.
Achievements
Everything is Crab Brutest Achievement Guide
Deal 50,000 damage in a single run.
Brutest achievement quick answer
Brutest requires 50,000 total damage in one eligible run; it does not require a 50,000-damage hit. Confirm the Codex mode tag before routing it.
A current community route uses Body Slam or Trunk with Size and attack-area scaling, then adds Pollinator POIs and Social pulls so more enemies enter the AoE. Lower Pressure can be easier for assembling the shell, but higher Pressure supplies more targets.
A second route stacks Chonky, More Mass, Muscular Tissue, Jaws/Stalker night damage, Nocturnal, Ambush, Minimalist, and Underdog, then bursts out of Burrow at night. Use whichever route can accumulate damage reliably before choosing Endless.
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.