Full list of all 40 Roundabout achievements worth 1,000 gamerscore. It takes around 25-30 hours to unlock all of the achievements on Xbox One.
Unlock the Inflatiboat For Cars
Unlock the Pickup Finder
Unlock the Reverser Wheel
Unlock the Traffic Coner
Unlock the Multiplier Freezer
Unlock the Beary Nice Music Box
Follow a lady into the big smoke
Make a huge mistake
Hidden
Survive the Mountain Fair Demolition Derby without exploding
Stand still for a minute of silence at The Memorial
Honk your horn 500 times, then honk your horn 500 more
Die 360 times
Revolve over 53,596 times
Aggressively warn a dozen pedestrians with the Traffic Coner
Purchase a pet eagle
Complete your first eSports Speedrun Challenge
Get a better eSports Speedrun Time than the No Goblin team
In "Ball Bouncers", bounce the ball at least 12 times
In "Run Like Crazy", get 150 yards away
In "Death from Above", survive for 30 seconds
In "Limocide", take out 50 pedestrians
In "Farming Simulator 1977", complete your farming in under 40 seconds
In "Destruction Derby", take out 8 cars
In "The Great Hunt", find 6 regions
View the "How's Your Driving" screen outside of the DMV.
Purchase some property
Purchase something from The Chrome Dome
Reach a 35x multiplier
Collect every Cash Stash
Accomplish every Sick Jump
Collect every star in a single ride
Discover all of the horns
Purchase every hat and paint job
Collect every star in every ride
Purchase every property
Reach 100% completion on a mission
Reach 100% completion for the entire game
Complete an eSports Speedrun without exploding
Drive the entire "classic" length of Desert Limo without crashing