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