SteamOS is now officially on the list of Linux distributions Epic Games plans to support with its new Epic Games Launcher. In a statement to GamingOnLinux, Epic communications director Jake Jones said the launcher is still in Preview, and that Epic plans to "support as many Linux distributions as...
UT2k3 (maybe 2004 as well) actually came with a bootable Linux disc that would boot directly into the game. So they basically had an Epic OS long before Valve even thought about SteamOS.
Maybe Tim was always so anti Linux because it didn’t pan out back then.