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