Bonelab is an experimental physics VR game where players can explore a mysterious lab full of weapons, enemies, challenges and secrets. After being given a death sentence, you will need to escape from a hidden underground research facility and go through a series of challenges including arenas, obstacle courses, tactical trials, sandboxes, experimental modes, and user-generated levels.
This guide will tell you how to unlock the SUB 1:50 achievement in the game.
SUB 1:50 Achievement Guide – Bonelab

In order to unlock the SUB 1:50 achievement, you will need to first select the Monogon Motorway level under the mods section of the Game Hub screen.

After the level starts, use the go-kart on the track and complete 3 laps within the time limit of 1 minute and 30 seconds. While it might sound impossible, it’s relatively easier to achieve if you use the slow-motion feature while manoeuvring through the corners.

It will take a couple of tries before you manage to complete the challenge since driving through the corners is hard. Just press the X button on your Oculus controller to activate slow motion and you are good to go. If you fail then you can easily retry by pressing the large button on the side of the building near the starting line.
That’s it, now go ahead and set the fastest lap on the track to unlock the achievement!