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