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