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Supposedly Cosmic was published in 16 editions, so any additions or corrections would be extremely welcome.
I happily have copies of most of these

Year	Manufacturer	Component	Images	Contents/Rules
1972	Eon	Prototypes	1972 Powers PB Plexi Covers Components
1977	Eon	Cosmic Encounter [landscape box]	front contents	Eon list
1978	Eon	Cosmic Encounter [oracle box]	front 2 back	rules: ps pdf, rev_hexes appendix [pdf], french aliens
1982	Eon	Cosmic Encounter [big box]	front all	appendix: ps pdf
1977	Eon	Expansion #1	1	Eon list
1977	Eon	Expansion #2		Eon list
1978	Eon	Expansion #3	3 3.b	Eon list
1979	Eon	Expansion #4	4	Eon list
1980	Eon	Expansion #5	5 5.b	Eon list
1981	Eon	Expansion #6	6	Eon list
1981	Eon	Expansion #7	7	Eon list
1981?	Eon	Blank Cards		10 cents each through Eon mail order
1982	Eon	Expansion #8	8	Eon list
1983	Eon	Expansion #9	9, Aristocrat	Eon list
198?	Eon	T-Shirt	front (back empty)	About 500 of these were made (according to Kittredge)
1983	Grow Jogos e Brinquedos	Contatos Cósmicos (Brazil)	front contents	rules
1985	Altenburg-Stralsunder (ASS)	König der Sterne [German/West End]	front all
1986	West End	Cosmic Encounter	front	list
1986	Games Workshop	Cosmic Encounter [British/West End]	front back all 2 cards powers	list
1986?	Descartes	Rencontre Cosmique [French/West End]	front set ext back	(JD/DISC: two set) List, photos
1986	Descartes	Rencontre Cosmique [French/West End?]	front set, prev. avail from LeValet	(JD/L003: single set)
1987	Alga/Brio	Universums Härskare (Sweden)	front all board	list rules
1987	Alga/Brio	Universumin Valtiaat (Finland?)	board powers cards
1991	Mayfair	Cosmic Encounter	front all 'Eons' prototype 2 3	list, rules, rev_hexes, french aliens, italian [pdf]
1992	Mayfair	More Cosmic Encounter	front	list
1995	Mayfair	Simply Cosmic Encounter	front	list
1995	Mayfair	Even (A Bit?) More Cosmic Encounter (never finished)
1995	Mayfair	Novas (CE card game??)
?	Mayfair	Parts: extra hexes, blank cards, etc..
1991	Hexagames / TST-Enterprises	Cosmic Encounter [German/Mayfair]	front back loser
1999?	Future Pastimes/Eon	Java Online game	proto
2000	Hasbro/Avalon Hill	Cosmic Encounter	front back set 5/6 players [pdf] A [png] B [png]	list list, rules, french [pdf]
2000?	Hasbro/Avalon Hill	PowerHouse card	front back	Distributed at gaming conventions, very rare
2001	Future Pastimes/Eon	Shockwave Online game	proto	--
2003	"Eon"	PowerHouse card	front	Reformatted for Eon
2008	Fantasy Flight Games	Cosmic Encounter	front, board	rules (a blend of Eon/Mayfair?)
Unknown Sets:
Year	Manufacturer	Component	Images	Contents/Rules
??	Tsukuda Hobbies	Japan	contents	"コスミックエンカウンター ---カードゲーム"
88/89?	Mediagenics/Activision	Apple ][gs game	AppleLink Computer Network was other player (Steve Case preAOL)	Trivia: Steve Case was a playtester
~80/82	Archive Miniatures 2101-2104	(figures - not a game)	2101-Wrack 2102-Oracle 2103-Mind 2103-Macron 2104-Sorcerer 2104-Zombie	Wrack; Oracle; Mind, Macron; Healer, Zombie, Sorcerer

This table was generated using eperl on this file

Trivia/Translations:

• Prototypes were made for an early 70's BOSKONE SF convention where the public played CE for the first time, including player Ned Horn, who made the initial investment of $18,000 which started Eon Products.
• The Eon 1982 box cover was painted by Dean Morrisey, representing the "first meeting between the Clones and the Vulches" [Encounter v1.2]
• Peter Olotka was formerly in the Peace Corps [ref]
• König der Sterne == King of the Universe
• Mayfair info: (708)647-9650 / mayfair@aol.com
• Many have complained about the fact that two of the colors in Mayfair's set are so similar (light and dark blue). It happened because a color-blind employee (the Art Director?) at Mayfair though that red and green were too confusing, so he pulled the green plate and put in another blue.
• Eon's first printing: 10,000 @ $2.70 a game
  Second printing: 20,000
• Mayfair's original printings: CE 10,000; MCE 5,000; SC 10,000?
• Available versions can be bought at FunAgain
• Availability of Universums Härskare (from Brio employee Annika Furuvik <annika.furuvik-at-brio.se>): "We just have a few left of Universums Härskare and we keep them very hard"

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