What are the names of these two movies?

The first one is a horror movie and it's about these people like stuck in an office building and theres this video game and this thing comes out of it and starts killing the people. The second one is about like something like an atomic bomb or asteroid hit the earth and everyone was turned to dust. All I... show more The first one is a horror movie and it's about these people like stuck in an office building and theres this video game and this thing comes out of it and starts killing the people.
The second one is about like something like an atomic bomb or asteroid hit the earth and everyone was turned to dust. All I remember is people who survived in like a movie theater or something like that.
Hope this is enough info for you guys to guess.
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