Quake was one of the first fully 3D First-person shooter games. It has its influences from Doom in terms of gameplay, design, and story. For example, Quake features a similar arsenal of Weapons as well as teleporters. Features original to Quake, like the console, later appeared in Doom source ports.
(The reason for having a non-embedded version is just in case you cant type in specific text boxes in games or if there are glitches.)