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