Storywise I think a lot games would make a good source for good movies. My personal problems with the ones we're getting is, that they are so similar to the original that they are basically just remakes.

Take the recent Tomb Raider movie, after I've seen the trailer I had no desire at all to go watch it. Why would I watch something that I've experienced for over 20 hours in depth and on my own pace already. I don't know, maybe a lot of people got excited when they saw her with the plane: "Hey, look, it's exactly like the game!" For me it was just boring.

Instead focus on a character that isn't the main one in video games, use the setting etc. F.e. as a Dark Souls fan I would love for a movie to add some backstory for Solaire. Scrap any stupid references to the game like putting a white sign on the ground to summon somebody, instead just let Solaire meet another traveller (at a bonfire ;D) or anybody dying and then respawning. There you have it: (A already beloved character, ) a man of faith looking for divinity (or whatever) while travelling to faraway lands (supernatural or not) is confronted with the unbearable evils of this world to have a crisis of faith which he either overcomes or goes mad over.