As of 2015 causes some graphical glitches with new Nvidia drivers. Ultra - Recent medium-high-end machine and graphics card (2011 or later) recommended.There are four graphics modes, which you can switch between via an external batch file ('High' is default): These builds are legal and do not contain pirated content. If it were not for these people, this build would not exist. It's made out of the Darkplaces engine and many mods from members of the Quake One forums and elsewhere (these are listed at the bottom of the page) as well as my own work. Quake Epsilon is a graphically enhanced build of shareware Quake 1 for Windows/Linux/Mac, which can be upgraded to the full version of Quake along with it's mission packs Scourge of Armagon and Dissolution of Eternity by copying the full-version. Quake 'Epsilon' Builds for Windows/Mac/Linux