Question: D6 Space is a game that is based on a system that was named after what?

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General Quarters (rules): General Quarters is a set of naval wargaming rules written by Lonnie Gill.  Quick and easy to play they have become one of the most popular series of World War I and World War II era naval rules (they topped the poll of popular wargames rules amongst the Naval Wargames Society.  There are currently three versions available.  GQ1 covered World War II and used a d6 based system.  GQ2 expanded coverage to World War I whilst also introducing new rules for World War II games; it also introduced a revised combat system that used a d10 in addition to d6.  GQ3 was a complete revision published in 2006.  A revised World War I version was announced for release in September 2007, and published as Fleet Action Imminent . There are a number of campaign supplements for GQ3.  First is The Solomons Campaign about the World War II Guadalcanal battles.  Next is Sudden Storm a hypothetical campaign dealing with a war, between Japan and the US in 1937.  A surprisingly possible occurrence, and one that yields a lot of big gun battles as the US fights its way back across the Pacific to the Philippines.  All in a very smooth and playable format.

D6 System: The D6 System is a role-playing game system published by West End Games (WEG) and licensees.  While the system is primarily intended for pen-and-paper role-playing games, variations of the system have also been used in live action role-playing games and miniature battle games.  The system is named after the 6-sided die, which is used in every roll required by the system.

D6 Space: D6 Space is a generic science fiction role-playing game (RPG) based on the "D6 System".  Although derived, in part, from material originally presented in "The Star Wars Roleplaying Game", "D6 Space" is published as a stand-alone rulebook (not dependent upon or requiring other D6 System or Star Wars rulebooks) and is supported by its own line of supplements.

Grimm (role-playing game): Grimm is a role-playing game, released by Fantasy Flight Games.  The current version is a standalone game using the Linear D6 system.  The Linear D6 version is a significant expansion of the original material, including a more fully developed setting, a monster manual and game mechanics, all of which were previously provided by the core D20 System rule books.

List of D6 System books: List of D6 System books is a listing of commercially released books from West End Games, its successors, and licensees for the D6 System role-playing game.  This does not include various free downloads, fan-made works or forthcoming releases.  Accessories such as card decks, screens and miniatures are also not listed.  All books are print editions unless noted as otherwise.

Barry Reese: Barry Reese (born November 11, 1972) is an American writer.  He is best known for his work on "The Official Handbook of the Marvel Universe" for Marvel Comics, "D6 Space: Fires of Amatsumara Worldbook" for West End Games and his pulp adventure universe series of novels.  He is married to artist Cari Reese and together they have one son, Julian Reese.

D6 Fantasy: D6 Fantasy is a generic fantasy role-playing game (RPG) based on the D6 System.  D6 Fantasy is published as a stand-alone rulebook (not dependent upon or requiring any other D6 System rulebook) and is supported by its own line of supplements.

Space system (gaming): A space system is a hardcode or softcode system for a game server which simulates a three-dimensional space.  A space system such as HSpace (for Hemlock Space) is used on a PennMUSH game server, which simulates three-dimensional space in a text environment.  Such a system provides for the navigation of vessels, and sometimes ship-to-ship combat.  HSpace isn't the only space system available for PennMUSH, and there are almost certainly space systems available for other servers.  Space systems don't generally only contain ships, either.  Planets, stars, and stations, for example, may be present in the simulation.  Another space system, ASpace, even employs a system for nebulae and borders, though the borders are spherical and not actually marked.  Different space systems are generally suited for different themes.  HSpace, for example, may be more suited for a Star Wars MUSH, (though SW1 uses a softcoded system, called DarrienSpace) while ASpace is generally used on Star Trek MUSHes because it will handle warp speeds.

D6 Adventure: D6 Adventure is a generic role-playing game system based on the D6 System.  "D6 Adventure" is published as a stand-alone rulebook (not dependent upon or requiring any other D6 System rulebooks) and is supported by its own line of supplements.

Star Wars: The Roleplaying Game: Star Wars: The Roleplaying Game is a role-playing game set in the "Star Wars" universe, written and published by West End Games (WEG) between 1987 and 1999.  The game system was slightly modified and rereleased in 2004 as "D6 Space", which used a generic space opera setting.  An unrelated "Star Wars" RPG was published by Wizards of the Coast from 2000 to 2010.  Since 2012 the official "Star Wars" role-playing game is another unrelated game, published by Fantasy Flight Games.

Supporting paragraphs: D6 Space D6 System
Answer: the 6-sided die