I've been following 'The Other 99' [Steam] hoping to see a Linux release soon, so I poked the developers about an update. They said they need fixes from Epic due to bugs in Unreal Engine 4 and Linux support.
From the reply to me on Steam:
Unfortunately, Unreal Engine 4's Linux support is somewhat limited, especially regarding up to date graphics/rendering features. We put a ton of work in to getting our game up to date on Linux/SteamOS, and from a technical and game-code standpoint, we are there, but a specific bug in UE4's rendering messes with the game's landscape.
We are now just waiting on an update from Epic Games to fix the specific rendering bug, at which point we can put The Other 99 out there on Linux.
We are really disappointed we haven't been able release on other platforms sooner, but are keeping an eye out for updates, and will release as soon as possible!
Hopefully Epic won't keep them waiting for too long, as it looks pretty decent. What is great, is their open and honest response to the lateness of the Linux version.
They aren't the only developer facing issues with Linux and Unreal Engine 4, as it's what is also holding up EVERSPACE (see here).
About the game
The Other 99 is a single player, first-person, action-survival game. Ripped from your ordinary life you awaken on a desolate Hebridian island with nothing but a single note that reads, “The only way off the island is through The Other 99”
Described as a British Battle Royal, Lost meets Fight Club and digital Lord of the Flies.
The Other 99 is a game of mystery, exploration, brutal combat, stealthing mechanics and problem solving. But be careful: Permadeath is included!