Are we also discussing cartoon adaptations as well? Speaking of Dead Space, Downfall was pretty interesting in how it interpreted the outbreak of the Ishimura infestation. There was also Aftermath, an animated film that took switches between a 3D-esque style and a cartoon style (in order to designate flashbacks and such), but it wasn't as good as the other one, IMO. It's essentially a bridge between the first two games, you learn a bit more about Nolan Stross (Downfall also features him), and there's a reference to Isaac at the end. That's about it.
I don't usually go looking for movie adaptations of games. I think the only one I saw proper was Bloodrayne, but considering how I didn't play the game, I can't say much on how well it was adapted.
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