Here is the full list of all 15 Disney Infinity 3.0: Play Without Limits achievements.
Complete 75 Feats
Complete all Toy Box and INterior tutorials
Complete 50 Feats
Play all Toy Box Adventures
Earn 10 Toy Presents in the Toy Box Hub
Complete 25 Feats
Feed Sidekick 50 times
Harvest 100 plants
Save a Toy Box
Build a 20-room INterior
Throw a party for your friends in one of the designated Sidekick Rooms
Play a downloaded UGC in the theater (Steam, Single Player Only)
Earn 5 Sidekicks
Complete 5 Feats
Reveal all the terrain in the Toy Box Hub