Its not the fault of the video game universes. Warcraft had a very rich lore, they fucked it up by not really explaining it properly. The script wasn't good, and so you didn't really give a shit about either the humans or the Orcs, though to their credit I think more people sympathized with the greenskins than the little pink humans.

Case in point: Max Payne. What an incredible game, an incredible storyline. They had all the pieces to make it a great film: you really only need 1 great actor in that movie, the rest just need to be serviceable. And they go out and get Mark fucking Wahlberg. Mark is decent but you needed a brooding, darker figure than him.

You could carry over the voiceover-style from Max Payne, and I honestly don't think the movie would have suffered if it was in a pseudo-black and white like Sin City. In fact I think if Frank Miller got to make that movie it would be even better than Sin City. But they went the cheap way, they got Wahlberg and Mila Kunis and the rest didnt matter, they werent relying on word of mouth for it.

Same goes for Hitman. They made TWO movies about Agent 47, both sucked, both with different actors and different explanations for his character. I mean, Agent 47 is also an extremely engaging character and they had so many different ways to approach the plot but again, the scripts were lazy and they didnt care about word of mouth, they wanted a good weekend or two and then bluray/streaming revenue.

So its not the video games, its the approach to adapting them.