I've addressed 696969 in private messaging. Some of the ideas work, but some are either contradicting, unnecessary or I'm too uninformed to add them. Here's what we went over in PMing:

"Assassins creed, Uncharted, Watch dogs, spec ops, splinter cell, Far cry, Red dead redemption, Metal gear solid, and Mirrors edge. I feel like all these games could've happened in my timeline. But since none of them provide any technology that is revolutionary, I'd rather not add them since I don't know what year they'd have happened. I do like assassins creed, but adding them to the timeline would just be adding extra fluff, it'd be nice to have but not necessary.

Wolfenstein, isn't that a world in modern times where if Nazis won world war 2? Or is it limited to the 1940s? If so, tell me where best to put it.

Half-life and portal are both in the same universe orginally. Where do they take place? What year would be a good year?

F.E.A.R. and Left 4 Dead, do those games end the world? If so I can't add them. But if it's any consolation, resident evil is already on the list.

Titanfall, what year did this take place? I think I could make it work.

Rage, what is that game about?

I know nothing about command and conquer, system shock or Warhammer. What year would be good for those? Isn't Warhammer like forty thousand years into the future? If so, my timeline hasn't even reached that far yet, so I couldn't add it anyway."

To answer samtheginerninja, 

I know nothing about Portal/half-life, what year would be appropriate?

In doom, the world kind of ends doesn't it? I could consider adding it if I change it so the demons don't escape hell. Also you said it's sort of paranormal since it has hell right? Well that's not a big problem to me, I can just say that by portal to "hell", they mean portal to a different dimension. And by "demons", they mean creatures from another universe.

For aliens vs predators, keep in mind I'm doing my best to limit this to only games. Movies and tv shows would be too much for me to add. Since AVP are also games, and since I think they'd fit well with the universe, I can probably add them somewhere.

I don't want to add transformers, they're a bit over powered compared to the rest of the aliens in my universe. But if you put up good argument, I can add them.

You asked about metroid: I was thinking that she's a mercenary traveling the dark parts of the terminus system. So yes, the metroids are limited to the terminus systems.

Mega man x: I had to rely on Wikipedia for them. I knew about the world altering events and have decided to limit it to Taiwan since the rest of the world already got destroyed from the fallout event.