So, before you start saying that this game is cryptominig, consider the following.
 
 

This game has no FPS cap

It means it tries to use as much resources as GPU allows. So far the game doesn’t have an option to limit it. But you do. Try to do something from bellow and see if it helps to deal with your fear.
 
 
 

Limit Your FPS yourself

I use GeForce videocard, so I’ll describe, how to do it for GeForce cards:
 
 
Since driver version 441.87 you can use NVIDIA control panel to do this. Select 3D Settings -> Manage 3D settings and find an option “Max Frame Rate”. Also there you can setup inactive FPS.
 
 
For Radeon users and some other stuff that probably exists – find an analog. Sorry I can’t help you with a proper advice 🙁
 
 
 

Example

I’ve fixed my fps at 60 (because my monitor is old anyway and doesn’t do anything at higher) and my GPU usage got reduced by 20-25% on average. I’ve fixed my inactive FPS to 30, and when the game is on background, it uses only 35-40% of GPU. CPU usage also gets reduced (it seems CPU somehow involved in rendering).
 
 

 
 
Here we come to an end for Spirit Detective What to do if your GPU is at max 100 hope you enjoy it. If you think we forget something to include or we should make an update to the post let us know via comment, and we will fix it asap! Thanks and have a great day!