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