The assets for the game[1] released in 2004 are not open sourced. You will need some files from the original DVD (or archive.org).

[1] https://en.wikipedia.org/wiki/Perimeter_(video_game)

I’m fairly sure that one can still buy the game on GoG, etc.

Not sure if data files are the same as original cd/dvd…

It's on steam also https://store.steampowered.com/app/289440/Perimeter/

Got noösphere vibes, not surprising for Russia

I remember seeing this game on G4 during a review segment and thought it would be so slick.