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