Marvel 2099: One Nation Under Doom is a cancelled 2D sidescroller action game that was in development by Saffire for the original Playstation. The project would have been published by Mindscape in 1996, but the company decided to stop publishing some of their console titles and One Nation Under Doom was one of them. After Marvel 2099 was canned, Saffire started to develope Bio F.R.E.A.K.S. and Rampage World Tour for the Nintendo 64.
As we can read on Wikipedia, by May 1996 CD-ROM and VHS video demos of Marvel 2099 were being shipped to game magazines for pre-release reviews, along with a one-page color brochure. The first public demo was shown at the E3 1996 show, and featured a playable single level of the Punisher 2099 fighting SHIELD troops, and also opening menus and some cut scenes. Electronic Gaming Monthly had two quarter-page previews of the game, showing grainy shots of actual gameplay, and a group shot of the player characters. At the 1996 San Diego Comicon, the Mindscape booth handed out brochures, and raffled off One Nation Under Doom pins, shirts, and posters. Some attendees were even allowed to play the demo at the booth, although no copies of the demo were distributed.
We can only hope that one of these playable demos could be found and shared with the community in the future .
Thanks to Celine for the contribution! Thanks to Daniel for the video!