text: Certain game titles were even able to be ported due to availability of shared engine code even though the game's code itself remains proprietary, lost, or otherwise unavailable, such as the video games Strife, Doom 64, Catacomb Abyss, Blake Stone: Aliens of Gold, Super 3D Noah's Ark, Pathways Into Darkness, Marathon, Ultimate Gloom, Zombie Massacre, Blood, PowerSlave, Redneck Rampage, or the multiplayer component of Star Trek: Voyager – Elite Force. Some games have even been ported entirely or partially by reverse engineering and game engine recreation such as WarCraft II through Wargus or Commander Keen through Commander Genius. Another trick is to attempt hacking the game to work as a mod on another native title, such as with the original Unreal. Additionally, some games can be run through the use of Linux specific runtime environments, such as the case of certain games made with Adventure Game Studio such as the Chzo Mythos or certain titles made with the RPG Maker tool such as those by Freebird Games. Games derived from released code, with both free and proprietary media, that are released for Linux include Urban Terror, OpenArena, Freedoom, Blasphemer, World of Padman, Nexuiz/Xonotic, War§ow, The Dark Mod, and Excalibur: Morgana's Revenge.
  Massively multiplayer online role-playing games
  This is a selected list of MMORPGs that are native on Linux:
  A Tale in the Desert III (2003, eGenesis) – A trading and crafting game, set in ancient Egypt, pay-to-play.
  Crossfire (1992) – A medieval fantasy 2D game.
  Dofus (2005, Ankama Games) – A 2D fantasy MMORPG.
  PlaneShift – A free 3D fantasy game.