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