1. Make sure your system fulfills the minimum system requirements
   
2. Update your graphics card drivers:
   
   • Nvidia[www.nvidia.com]
     
   • AMD[support.amd.com]
     
   • Intel[www.intel.com]
3. Make sure your dedicated graphics card is used
   
4. Install all operating system updates
   
5. Close recording applications like MSI Afterburner, Riva Tuner, ...
   
6. Close intensive applications like your browser, ...
   
7. Disable your anti-virus application or exclude the game from it
   
8. Set operating system to maximum battery performance plan
   
9. Verify integrity of game files using Steam client
   
10. Reduce the in-game graphics quality/resolution and enable fullscreen mode

See the solution in this Nvidia issue[nvidia.custhelp.com] or alternatively change Refunct's window mode to Window or Windowed Fullscreen

• Don't think about motion sickness
  
• Tweak the field of view (try lower first)
  
• Reduce mouse/gamepad sensitivity
  
• Reduce the graphics quality to get at least 60 frames per second
  
• Set Anti-Aliasing to Low or None
  
• Don't hide the reticle

If the issue persists please ask the helpful community in this forum or on Discord[discord.gg]. Thank you!