Here is the full list of all 105 Bum Simulator achievements. It takes around 12-15 hours to unlock all of the achievements on Windows.
Find all feathers.
Complete all Dr. East's side quests.
Destroy the armor of a Bug Knight with an exploding projectile.
One-shot a Bug Shaman with an electrifying projectile.
Complete a Dr. East's side quest.
Earn 500$.
Discover the Flash Bourbon recipe.
Discover the Green Goo Vodka recipe.
Collect all blueprints.
Discover the Clown Royale recipe.
Get electrocuted.
Earn 50 respect.
Produce a pack of cigarettes.
Complete the main story.
Attain level 30.
Attempt to interrupt the villain's monologue.
Solve the EvilWay maze.
Place antennas in three different bases.
Charge the battery.
Blow up.
Catch 10 things in a single Pigeonado.
Collect all costumes for your pigeons.
Die of dehydration.
Find 25 feathers.
Die of hunger.
Find 10 feathers.
Get into a fatal traffic accident.
Urinate on your own fridge.
Take a shower.
Hang a tribute for your best friend in your base.
Fall from too high.
"Win" the fight on the rooftop.
Retrieve the EvilWay security key card.
Cook the Bum's Special.
Apply a costume to your pigeon.
Urinate on a puking person.
Sleep on a bench for at least 8 hours.
Harvest a sustainable homegrown plant.
Acquire resources from a minion sent on a mission.
Roast a vegetable or a fruit.
Create paper for the first time.
Drown.
Accelerate plant growth with guano.
Recruit a Creep in your base.
Get a grade of F when drawing.
Buy a drink or snack from a vending machine.
Support John's business.
Complete all Richman's side quests.
Complete all Mr. Jello's side quests.
Liberate all base locations.
Complete all Trixie's side quests.
Feed Little Bro.
Become a five-star player.
Complete a Trixie's side quest.
Throw a Bug into the ocean.
Fully upgrade Peckers.
Fully upgrade Pigeonado.
Pay off a bug raid.
Smelt copper for the first time.
Fully upgrade Pigeon Shuriken.
Smelt aluminum for the first time.
Paid (with) your respects.
Prepare Hot Dogs for beachgoers.
Earn 100$.
Complete a Richman's side quest.
Support Richard's business.
Try Italian cuisine.
Complete all shooting gallery side quests.
Knock a corrupt politician down a peg.
Attain level 15.
Liberate another base location.
Find the Safehouse.
Earn 10 respect.
Collect 10 blueprints.
"Pick" a lock.
Interact with a phone booth.
Obtain a free product from a vending machine.
Harvest any homegrown plant.
Find a feather.
Finish the investigation of the EvilWay secret EvilLab.
Destroy EvilWay's surveillance equipment.
Try American cuisine.
Complete one shooting gallery side quest.
Transport a passenger on Carl.
Attain level 8.
Earn 25$.
Complete the presentation of Fus Doh Beer.
Meet the good doctor.
Collect a blueprint.
Defend successfully from a raid.
Decide to defend your base.
Earn some respect.
Complete a Mr. Jello's side quest.
Pawn 0.01$ worth of items.
Deliver Mr. Jello's package.
Fill Carl's inventory.
Meet the Pigeon Lady.
Level up.
Learn about Shuriken Pigeon.
Get Bugzy his due.
Try to get money from the BPD.
Learn to work for change.
Achieve a grade of A when drawing.
Consume your first find.
Listen to the whole main menu song.