Great observation.
I'm still confused whether they would be good or not, but I agree if Tomb Raider and Sleeping Dogs are the most potentially good and looks more 'makes sense' to be made into movies. I can picture how they would be as movies. Rampage, the director said it would start from some kind of a lab accident that cause the animals to be mutated (typical accident plot), but the only thing I can imagine is the monsters destroying stuff to the end of the movie. And the rest... Uhh nope, I'm not sure about the rest either.
I didn't expect someone would think that Minecraft maybe could work lol, and yeah I think the main target audience would be children but also could be enjoyed by the young adults a bit, so is Sonic.

And thanks for your thought, @cleversleazoid, now I think I have a better perception on horror (games and movies).