Quick Answer
KOTAMON has 40 Steam achievements. Use the category filter for cards, collectibles, cereal boxes, money, upgrades and long cleanup counters, then mark progress locally before starting another long pile session.
August 27 Counter Note
The August 27 patch says counters for collected trash bags and drunk cans of beer are now calculated from save to save. That matters for Removal, Cleanup, Recycling, Annihilation, Barley a Beginning, Thanks for All the Beers, Lager than Life and Many Hoppy Returns.
Card and Kotalion Notes
Color-set achievements are separate from foil achievements. Get em All confirms Kotalion matters, and the August 27 patch says Kotalion can no longer be sold repeatedly after it is obtained.
Troubleshooting Unlocks
If an achievement does not unlock right away, verify the exact requirement, relaunch Steam and KOTAMON, and avoid deleting saves before checking the achievement fix page.