Here is the full list of all 28 Vexius achievements.
The base game contains 12 achievements, and there is 1 DLC pack containing 16 achievements.
Complete level 1.
Complete level 25.
Complete level 50.
Ignore all advice and run into a saw.
Teleport 500 times.
Destroy 500 boxes.
Toggle holocubes 500 times.
Toggle 500 doors.
Create and save a custom level.
Upload a custom level to the workshop.
Download a level from the workshop and get wrecked by a trap.
Achieve immortal status on all normal levels.