Posted July 09, 2014
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Capcom (Mega Man X, Breath of Fire IV, Resident Evil... | English)
http://www.capcom-unity.com/ask_capcom/go/thread/view/7371/30164995/classic-games-on-gog-resident-evil-1-3
Sega (Virtua Cop 2, House of the Dead, Sonic & Knuckles... | English)
http://forums.sega.com/showthread.php?410485-SEGA-games-on-GOG-com
http://forums.sega.com/showthread.php?421207-GOG-support
Koei Tecmo (Romance of the Three Kingdoms, Nobunaga's Ambition, Uncharted Waters... | English thread, Forum includes French, Italian, German, Spanish, and Russian sub-forums)
http://forum.koeitecmoeurope.com/showthread.php?31634-Re-release-old-games-on-GOG-com
Bandai Namco (Dark Souls, Pac-Man, Ace Combat Assault Horizon... | English)
http://www.bandainamcogames.eu/community/topics/classic-collections-on-current-and-upcoming-platforms-pc-included/year/2013/month/02/day/11/show/all
Warner Bros. Games (no GOG threads yet) (Mortal Kombat, F.E.A.R., Batman: Arkham Asylum... | English)
http://community.wbgames.com/
Will add Warner when a thread is started, but not before...
Should also mention that it´s a bit tricky for non-UK and non-US-Users to get to that NamcoLink---you´ll first have to visit http://www.bandainamcogames.eu, it will than switch to your country and you´ll than have to switch to UK via the little flag at the top! Then you´ll be able to use the link---before that step it will link to a dead end!