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