The video with all the information on what I’m yapping about:
~ portals in '95!
The bit of actual NEWS
Apogee posted this
Throwback to E3 1997! Four exclusive screenshots from Apogee’s original build of Prey, shown behind closed doors in our private press room.
Source: Apogee Entertainment facebook page. They post a lot of retro stuff, contracts from development of Rise of the Triad, the entire script of Max Payne the Movie 
etc.
More footage
I can’t upload random .zips on here 
This game had a weird everything and it basically ran as an entire Operating System on top of DOS, here’s the boot screen for Prey OS:
https://tcrf.net/Development:Prey_(2006)
A few more screenshots:
Source: x.com 
Playlist with a few more games no one ever got to play: