Now, who will you choose? On the site we have a large number of cosplayers who display amazing cosplay costumes. These cosplay ideas are extremely detailed, but that will ensure that you have a top-notch recreation of your favorite character from the show! This is usually the way to go to find different ideas for making cosplay costumes. Martin’s books, thor costumes Game of Thrones. While last weekend each cosplayer was able to pick their own source universe within a general theme of “Space Opera.” This week everyone had to create a costume which would fit into the world of author George R. R. Martin’s Game of Thrones.