Here is the full list of all 9 Reality Incognita Demo achievements. It takes around 0-1 hour to unlock all of the achievements on Windows.
Bathe in the shower room
Get out of Hibernation Room
Ask the Robot Butler to fix the electric box for you
Fix the electric box by yourself
Die when attempting to fix the electric box
Wipe the blood from the floor
Prepare everything to go into the dark kitchen storage
Finish the demo of Reality Incognita
Slice the chairs