So, I don't think anybody has made requests of anything Mass Effect, Assassin's Creed, and/or Dragon Age yet, so I'd figure I'd chip it in.
WARNING: There are many pictures, and I haven't been here long enough to learn how to dial down the size (if it's possible at all), so some most of the pictures are really large. I apologize in advance.
So, first off, we have Assassin's Creed. In my attempts to locate the Assassin Insignia, I stumbled across two variations of it that corresponded to either the insignia for Assassin Armor, or the insignia worn on the armor; and the personalized insignia of the Ottoman/Turkish branch of the Assassins, as seen in
Assassin's Creed: Revelations. Other than that, we have the logo for the Templars, and the logo of Abstergo Industries, a modern-day front for the Templars.
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Next, we have Dragon Age. It was my intention to find a piece of art that clearly showed the dragon, made of blood, that is showcased behind the Dragon Age name in several promotional pictures. I could not find a good-enough picture, but I found a few heraldries that make good subtitutes: The Kirkwall crest, which can double as the unofficial logo of
Dragon Age II; The symbol of the Grey Wardens; The House Cousland family crest, which has great significance to a player character in
Dragon Age: Origins that has taken the Human Noble backstory; and the crest of the Seekers of Truth.
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And finally, we come to Mass Effect. Our first picture comes in the form of the official insignia of the Systems Alliance, while the second comes in as the insignia of Cerberus. The third and fourth are the symbols for a Paragon and Renegade Shepard, respectively, while the fifth is the mark of the Special Tasks and Recon unit, known as the Spectres.
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Well, that's it for now. Sorry if this is a major overload, and I understand that you probably won't be able to do them all. Still, to have even one for each of these series would be awesome.