Here is the full list of all 22 The Peanuts Movie: Snoopy's Grand Adventure achievements worth 1,000 gamerscore.
Collected all Jelly Beans in a single level
Rescued all the Kids
Completed all Melody Chateau levels
Completed all Parisian Underground levels
Unlocked the Detective Costume
Unlocked the Joe Cool Costume
Unlocked all Costumes
Completed all Skies of Paris levels
Completed all Lunar Surface levels
Broke through a wall as the Masked Marvel
Unlocked the Masked Marvel Costume
Unlocked the Flying Ace Costume
A second player activated a Woodstock trigger
As normal Snoopy hovered for more than 5 seconds
Completed all Temple of Bunnies levels
Unlocked the Astronaut Costume
Completed all Peppermint Jungle levels
Defeated The Mask Boss without being hit
Jumped on three enemies without touching the ground
Unlocked the Beagle Scout Costume
Finished a Level
Collect all kids objects