Here is the full list of all 48 Celaria achievements.
The base game contains 40 achievements, and there is 1 DLC pack containing 8 achievements.
Achieve bronze medals on all singleplayer maps
Achieve silver medals on all singleplayer maps
Achieve gold medals on all singleplayer maps
Achieve platinum medals on all singleplayer maps
collect all hidden spheres in singleplayer mode
Perform 100 jumps
Perform 1000 jumps
Perform 5000 jumps
run 1000 kilometers
run 10000 kilometers
run 50000 kilometers
perform 100 slides
perform 1000 slides
perform 5000 slides
perform 100 rolls
perform 1000 rolls
perform 5000 rolls
perform 100 wallruns
perform 1000 wallruns
perform 5000 wallruns
Collect bronze medals on all 1 star maps
Collect bronze medals on all 2 star maps
Collect bronze medals on all 3 star maps
Collect bronze medals on all 4 star maps
Collect bronze medals on all 5 star maps
Collect silver medals on all 1 star maps
Collect silver medals on all 2 star maps
Collect silver medals on all 3 star maps
Collect silver medals on all 4 star maps
Collect silver medals on all 5 star maps
Collect gold medals on all 1 star maps
Collect gold medals on all 2 star maps
Collect gold medals on all 3 star maps
Collect gold medals on all 4 star maps
Collect gold medals on all 5 star maps
Collect platinum medals on all 1 star maps
Collect platinum medals on all 2 star maps
Collect platinum medals on all 3 star maps
Collect platinum medals on all 4 star maps
Collect platinum medals on all 5 star maps
Beat the bronze Any% speedrun time
Beat the silver Any% speedrun time
Beat the gold Any% speedrun time
Beat the platinum Any% speedrun time
Beat the bronze AllSpheres speedrun time
Beat the silver AllSpheres speedrun time
Beat the gold AllSpheres speedrun time
Beat the platinum AllSpheres speedrun time