Full list of all 38 Toy Story 3 achievements worth 1,000 gamerscore. It takes around 15-20 hours to unlock all of the achievements on Xbox 360.
Collect all the Gold Stars
Complete all Pict-O-Matic missions
Gather every collectible in the game
Explored all the objects on the map
Achieve gold on all carnival games
Find all the hidden townspeople
Find all the hidden aliens
Find all the Special Cards
Find all the Regular Cards
Purchase every item in the Toy Store
Collect all of Andy's Memorabilia
Complete 1 disc of Pict-O-Matic missions
Complete all Toy Camera missions
Finished "Muffin to Fear"
Finished "Trash Thrash"
Earn a gold medal in a vehicle challenge
Finished "Hide-N-Sneak"
Finished "Witch Way Out"
Find all 6 discs of Pict-O-Matic missions
Defeat Mayor Hamm in the Woody's Roundup boss battle
Finished "To Infinity and Beyond"
Finished "Fair Play"
Collect all of Zurg's Parts
Save Mayor Hamm from the bandits
Purchase Zurg's Spaceport
Hit 15 Paratrooper targets
Purchase Lotso's Enchanted Glen
Earn a silver medal in a vehicle challenge
Blow up the dam and expand your town
Purchase Sid's Haunted House
Finished "Hold the Phone"
Earn a bronze medal in a vehicle challenge
Buy a toy from the Toy Store
Finish the Woody's Roundup tutorials
Finished "Loco Motives"
Rescue all the orphans on the Train
Finished the Prison Break without ever tripping an alarm
Reach Zurg’s base without losing all your health