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