Get started with demo 1.0 by following this link to Mega:
https://mega.nz/folder/SXoUWSTY#_8I_geyfyHNj8_lgeNRHUw
Click on the "Download" button. Then click on "Download as a ZIP file"
Click on "Ok, got it"
Wait for the download to complete. Make sure you haven't blocked downloads for MEGA.
Once download is completed, open the "Demo 1.0" folder. It should appear in "downloads". Go to the "ChernobylExperience" folder. Double click on it and click on "Extract all".
A new similar folder should open up for you. Once in the new folder, move over to "UEPrereqSetup_x64". Double click on it to install the Unreal Prerequisites. This program is important for the game to work properly.
Go back to the start of the file and double click on "ChernobylExperience" that now should appear with a correct icon. Feel free to move this down to your task bar for easier acess.
Once you've opened the program. A "Windows has protected your pc" may appear. Click on "more info" and then "run away" to start the demo!
Once you're in you should see a welcome sign and music in the background. The FPS will be low at first but should improve after a few minutes.
To exit the game, Please use Alt + Tab.