Here is the full list of all 40 Roundabout achievements.
Reach 100% completion for the entire game.
Complete an eSports Speedrun without exploding.
In "Run Like Crazy", get 150 yards away.
In "Farming Simulator 1977", complete your farming in under 40 seconds.
Purchase every hat and paint job.
Unlocked the Multiplier Freezer.
Survive the Mountain Fair Demolition Derby without exploding.
Get a better eSports Speedrun Time than the No Goblin team.
Purchase a pet eagle.
Discover all of the horns.
Accomplish every Sick Jump.
Collect every Cash Stash.
Reach a 35x multiplier.
Purchase every property.
Collect every star in every ride.
In "Death from Above", survive for 30 seconds.
In "Ball Bouncers", bounce the ball at least 12 times.
In "Limocide", take out 50 pedestrians.
Unlocked the Beary Nice Music Box.
Honk your horn 500 times, then honk your horn 500 more.
Stand still for a minute of silence at The Memorial.
Aggressively warn a dozen pedestrians with the Trafffic Coner.
Complete your first eSports Speedrun Challenge.
Die 360 times.
Drove straight for Beth.
Unlocked the Traffic Coner.
In "Destruction Derby", take out 8 cars.
Unlocked the Pickup Finder.
Make a huge mistake.
Reach 100% completion on a mission.
Unlocked the Inflatiboat For Cars.
Follow a lady into the big smoke.
Unlocked the Reverser Wheel.
In "The Great Hunt", find 6 regions.
Purchase something from The Chrome Dome.
Purchase some property.
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.
Drive the entire "classic" length of Desert Limo without crashing.