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