Mechanics

Everything is Crab Achievement Trigger Guide: Codex Tags, Pressure, Extinction

By Nocti · Last updated

Some achievements are not universal single-run checks. The Codex entry decides whether credit is available in Regular Pressure, Extinction, Challenges, or Exploration Mode, so this page separates mode rules from total-damage, single-hit, and boss conditions.

Practical use

  1. Open the specific achievement in the in-game Codex before routing around a screenshot or damage number.
  2. Keep the counters separate: Brute, Bruter, and Brutest use total run damage, while Ultrabonk uses the maximum eligible single hit.
  3. If the Codex entry says Pressure runs, the credit must happen before Extinction or Endless rather than after the transition.
  4. A post-1.2 Pressure 12 run reached Extinction 12 with Whiplash, about 500% Feeding Speed, roughly 4,000 per hit, and more than 50,000 total damage, but the player reports that the 500-hit, 35,000-total, and 50,000-total achievements did not unlock after the transition. Treat this as evidence for completing Pressure-tagged thresholds before choosing Endless, not as proof that Projectile Tongue is broken.
  5. In a September 29 thread about a large Endless result that did not unlock an achievement, developer OddDreamsDigital told players to read the Codex and listed Regular Pressure, Extinction, Challenges, and Exploration Mode as the mode labels an entry may name. This does not mean every achievement works in all four modes, or that later Endless totals backfill a Pressure-only trigger.
  6. Recent Brute-line, Ultrabonk, and It was a dinosaur confusion all point back to the same first check: current patch version plus the exact Codex mode tag.
  7. When reporting a suspected bug, keep the Codex requirement, the end screen, and the relevant total-damage, max-hit, or boss screenshot together.

Achievement trigger checklist

What the Codex saysWhat it meansWhat to verify
Pressure runsThe credit must happen before the run transitions into Extinction or Endless.Do not use a later Extinction screenshot as proof for a Pressure-only tag.
ExtinctionThe achievement can trigger in an Extinction segment when the stated condition is met there.Keep the end screen or screenshot that shows the Extinction context.
ChallengesChallenge mode can award it, but only when the achievement specifically names Challenges.Do not assume a normal-run achievement will credit inside a challenge unless the Codex says so.
Exploration ModeExploration can award an achievement only when that achievement's Codex entry includes the mode.Do not carry an Exploration result into a Regular Pressure, Extinction, or Challenge-only requirement.
Unsure or buggedCheck live patch notes first, because 1.1.2 specifically fixed at least one achievement-credit issue.Keep the Codex requirement, patch version, and result screen together before reporting it.

On September 29, the developer listed Regular Pressure, Extinction, Challenges, and Exploration Mode as possible labels and told players to inspect each achievement in the Codex. The reply does not make every achievement eligible in all four modes.

Related pages

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Poison Trickster

Choose a way to apply poison, then build around the openings needed to use it. Compare Spit with Poisonous Saliva, Stinger, and the conditional Pedal Glands route without treating every card as mandatory.

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