Here is the full list of all 31 Mech Mechanic Simulator achievements.
Successfully finish 10 "Covert" missions with 4 threats.
Successfully finish 10 "Illegal" missions with 4 threats.
Successfully finish each of the mission types with 4 threats.
Successfully finish 10 "Mining" missions with 4 threats.
Successfully finish 10 "Arena" missions with 4 threats.
Successfully finish 10 "Scavenge" missions with 4 threats.
Successfully finish 10 "Distress" missions with 4 threats.
Buy and refurbish all mech types.
Mount each of the perks at least once.
Repaint your workshop.
Create 10 parts in the crafting station.
Remove the rust from 100 parts in the De-rusting station.
Weld 100 parts in the welding station.
Fix 100 parts in the electronics station.
Refurbish your first mech.
Earn more than $1,000,000.
Fix each mech type at least once.
Earn the max prestige level.
Finish a job with dynamic tasks.
Finish a job with a unique mech.
Finish a software replacement job.
Finish a time-limited task in a job.
Finish a job for the Cyb3r M3chs.
Finish a job with an advanced mech.
Managed to break the economy
Paint a mech.
Finish all bonus tasks in a job.
Buy your first station.
Buy the mechanic's license.
Clean a mech from dirt and mud.
Successfully finish 1000 jobs.