Unravel

Found the fourth missing piece

Found the fifth missing piece

Found the sixth missing piece

Retrieved the stolen piece

Found the seventh missing piece

Found the eighth missing piece

Found a broken half piece

Found the other broken half piece

Removed all thistles in one go

Found the hidden collectible in the kite flying section

Completed the whole level in one go without swatting any mosquitoes

Found the secret in the maze section

Made it to the water wheel without using a log raft

Smashed the coal bucket with the excavator to find the hidden collectible

Found the collectible in the crushing, zapping death machine

Broke every piece of ice on the way to the letterbox in one go

Cleared the snow away from all the branches in one go

Found the secret in the engine room

Successfully lassoed between 25 different attach points without touching the ground

Collected all Achievements

Mended a broken bond

Found every secret

Finished each level from start to finish without dying

Found the first missing piece

Found the second missing piece

Found the third missing piece