Here is the full list of all 40 Roundabout achievements.
Survive the Mountain Fair Demolition Derby without exploding.
Purchase every hat and paint job.
Reach 100% completion on a mission.
Die 360 times.
Stand still for a minute of silence at The Memorial.
Complete your first eSports Speedrun Challenge.
Get a better eSports Speedrun Time than the No Goblin team.
In "Run Like Crazy", get 150 yards away.
In "Limocide", take out 50 pedestrians.
In "The Great Hunt", find 6 regions.
Purchase a pet eagle.
Unlocked the Beary Nice Music Box.
Purchase every property.
Aggressively warn a dozen pedestrians with the Trafffic Coner.
Unlocked the Multiplier Freezer.
Purchase something from The Chrome Dome.
Unlocked the Pickup Finder.
Honk your horn 500 times, then honk your horn 500 more.
In "Farming Simulator 1977", complete your farming in under 40 seconds.
In "Destruction Derby", take out 8 cars.
In "Death from Above", survive for 30 seconds.
In "Ball Bouncers", bounce the ball at least 12 times.
Drove straight for Beth.
Collect every star in every ride.
Make a huge mistake.
Unlocked the Inflatiboat For Cars.
Unlocked the Traffic Coner.
Follow a lady into the big smoke.
Unlocked the Reverser Wheel.
Purchase some property.
Reach a 35x multiplier.
Collect every star in a single ride.
View the "How's Your Driving" screen outside of the DMV ride. Useful, isn't it?
Revolve over 53,596 times.
Collect every Cash Stash.
Accomplish every Sick Jump.
Discover all of the horns.
Reach 100% completion for the entire game.
Complete an eSports Speedrun without exploding.
Drive the entire "classic" length of Desert Limo without crashing.