Full list of all 40 Descenders achievements worth 1,500 gamerscore. It takes around 80-100 hours to unlock all of the achievements in the base game on Xbox One.
The base game contains 32 achievements worth 1,000 Gamerscore, and there is 1 DLC pack containing 8 achievements worth 500 Gamerscore.
Finish career+ in one session
Get 250.000 REP
Complete boss jump in Volcano
Start to finish run
Unlock 50 items
Finish peaks boss jump
Finish the credits
Complete 10 mini-bosses
Unlock 25 items
Reach 100 km/h
Unlock a shortcut
Get sponsored by a team
Reach the peaks
Jump over the train
Survive a boss jump
Finish a level after bailing
Unlock 10 items
Reach the canyon
Reach the forest
Land a double frontflip
Get REKT
Complete a team node
Full session without bails
Get 10.000 REP
Get 50.000 REP
Land a 360 frontflip
Land a 720 double backflip
Use the whoopee cushion 200 times
Complete all bonus worlds
Complete a sponsorship
Finish a level together with someone else
Finish a session with 3 different crew members
Complete all of the missions in the No More Robots Amateur Tour
Complete all of the missions in the Power Up Audio Amateur Tour
Complete all of the missions in the Liquicity Amateur Tour
Complete all of the missions in the RageSquid Amateur Tour
Complete all of the missions in the No More Robots Pro Tour
Complete all of the missions in the Power Up Audio Pro Tour
Complete all of the missions in the Liquicity Pro Tour
Complete all of the missions in the RageSquid Pro Tour