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