Here is the full list of all 22 Contraption Maker achievements. It takes around 25-30 hours to unlock all of the achievements on Windows.
Make & publish a contraption with at least 20 parts.
Make & publish a puzzle with at least 20 parts.
Complete this scenario using only Ropes, Rope Pulleys, Rope Hooks, Teeter Totters, and Bowling Balls.
Complete this scenario.
Run the hamster for a total of 500 miles.
Run the hamster for a total of 1,000 miles.
Edit a community contraption from the Workshop.
Complete this scenario without using the Dog Bone, Dog Food, Dog Treat, Dog Whistle, or the Cat.
Solve your first scenario.
Knock out Tim 5,000 times.
Pop a total of 2,500 balloons.
Blow up 500 cumulative tons of explosives.
Kill 15,000 zombies.
Accumulate 10,000 total basketball bounces.
Solve your first official puzzle.
Solve 50 official puzzles.
Solve 100 official puzzles.
Solve 150 official puzzles.
Solve 220 official puzzles.
Solve 30 community puzzles.