Here is the full list of all 22 Wingsuit: Gudvangen achievements.
Score a combo of at least 100K
Score a combo of at least 250K
Complete all objectives, gaps and collectibles
Survive a box landing
Survive 50 box landings
Hit a tree
Pull the parachute
Die a 100 times
Collect all ninja whales
Collect all hidden UFOs
Unlock all suits
Complete all gaps
Unlock all exit points
Perform a risky triple frontflip or backflip
Perform a risky quintuple frontflip or backflip
Perform a risky quadruple barrel roll
Perform a risky quintuple barrel roll
Complete all survival runs
Complete all record the pros
Fly for a total of one hour
Hit a box landing bullseye
Hit a bird