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