TL;DR: 28 achievements total. Clear the story, then clean up in five passes: gear → collection → money/casino → hard challenges. Bean, Fishipedia and Handyman are the riskiest β use a separate save.
Difficulty: Low freebie Β· Med needs planning Β· High dedicated prep Β· Very high separate save.
Kill your first creature.
Kill a Drip creature.
Finish the early Lighthouse culprit step.
Upgrade the boat engine.
Get a kill with no kill-score multiplier.
Complete the Forest food objective.
Get picked up by a seagull (event).
Start the grill.
Help the Tourist on Desert Island.
Earn a 5x kill-score multiplier.
Unlock a legendary skin from the slot machine.
Kill a creature with a 360 no-scope.
Buy the best engine.
Apply all attachments to one weapon.
Defend islanders from the Albatross route threat.
Eat a burnt creature.
Help the military defeat the located big creature.
Finish the game.
Bet on green and win at roulette.
Kill a boss within 10 seconds.
Make the boat fly (physics easter egg).
Eat a mini-boss.
Sell something worth 100,000 or more.
Find and kill all normal creatures.
Kill a seagull with dynamite.
Defeat the final boss with bare hands.
Find and kill all Drip creatures.
Finish the game within 1 hour.
How many achievements? Steam lists 28.
Hardest? Bean, Fishipedia, Handyman β speed, rare variants, or challenge restrictions.
Collector vs Fishipedia? Collector is normal creatures; Fishipedia needs Drip variants (late grind).
Is Bean stable? Some old skips may break after progression fixes; use a separate save.
The pit isn't "how to fight" but "order". Story → gear → collection → money/casino → hard challenges. Don't turn a first clear into an unfocused 100% attempt.
For boss specifics see the boss guide; for collection the fishipedia; for money the money & gear guide.