This is NaissanceE: a first person, puzzle, exploration platformer kind of thing, which is reminiscent of Portal - just... a lot stranger.
NaissanceE is a magical first-person exploration PC game developed on UDK by Limasse Five and has been announced to be available for free on Steam.
Hardcore Gamer: NaissancE, the exploratory platformer oddity known for its alien, geometric landscape and nauseating heights, has just added Oculus Rift support - with some caveats.
Videogamegeezer highlights three PC-only first-person games that need to be re-released onto the Xbox One and PS4, also suggesting improvements.
Among the Sleep was pretty good. Not all I was hoping it would be, but still a very strong title. Never played, naissanceE and Cryostasis, while interesting, was very, very poorly executed.
There are a number of titles that I feel are more deserving of a new audience.
Soldier of Fortune, made by Raven again like SOF2.. That multiplayer was so good back in 2002.