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