text: Popular early titles included Netrek and the various XAsteroids, XBattle, XBill, XBoing, X-Bomber, XConq, XDigger, XEmeraldia, XEvil, XGalaga, XGammon, XLander, XLife, XMahjong, XMine, XSoldier, XPilot, XRobots, XRubiks, XShogi, XScavenger, XTris, XTron, XTic and XTux games using the X Window System. Other games targeted or also supported the SVGAlib library allowing them to run without a windowing system, such as LinCity, Maelstrom, Sasteroids, and SABRE. The General Graphics Interface was also utilized for games like U.R.B.A.N The Cyborg Project and Dave Gnukem ported from MS-DOS. As the operating system itself grew and expanded, the amount of free and open-source games also increased in scale and complexity, with both clones of historically popular releases beginning with  BZFlag, LinCity, and FreeCiv, as well as original creations such as Rocks'n'Diamonds, Cube, The Battle for Wesnoth, and Tux Racer.
  1994–1997
  The beginning of Linux as a gaming platform for commercial video games is widely credited to have begun in 1994 when Dave D. Taylor ported the game Doom to Linux, as well as many other systems, during his spare time. Shareware copies of the game were included on various Linux discs, including those packed in with reference books. From there Taylor would also help found the development studio Crack dot Com, which released the video game Abuse, with the game's Linux port even being distributed by Linux vendors Red Hat and Caldera. The studio's never finished Golgotha was also slated to be released by Red Hat in box. Ancient Domains of Mystery was also released for Linux in 1994 by Thomas Biskup, building on the roguelike legacy of games such as Moria and its descendent Angband, but more specifically Hack and NetHack.