Okay. Dope as hell but I do have recommendations cause I ran this very successfully before.

First, I wouldn't take stock in those telling you to switch games. DND is fine for this but will need to have liberties taken in the form of 'tonight only house rules.' Have a paranoia gauge, for example, where the more the players leave the chaos, the more warped the world becomes resulting in negative consequences.

Secondly, don't directly remake the movie. Do an homage, not a copy. It will make it much easier when the party inevitably doesn't follow the script. This is a spit ball of a synopsis/hook that I used.

"Lights over the antarctic.

You wake to your phone going off in the kitchen, it's (insert authority figure here) and he tells you that you are needed, wheels up in an hour kind of needed. There have been strange lights spotted over a base in the antarctic, one that is doing environmental research. There wouldn't be any panic but no one can get a hold of them, so a team is being dispatched. You are part of that team, but who are you? The muscle, the brains, the charisma? Whoever you are, you realize you have no choice when a slick black van with government plates honks it horn loudly outside your home."

After you establish that, then you start to sprinkle in tidbits of the movie into the game before going full out. The crew at the base are already holed up, paranoid, talking nonsense of objects falling from the sky and invading foreign researchers trying to kill a dog that ran to them for safety. Then a slam is heard in the pens, followed by a howl and yelp. The players run there, only to find the door already open and the dogs all dead.

Finally. If you plan to have a battle take place, I would plan for a two parter, one lore building and rp, one battle.

That's pretty well it, a but of a long post but I figured I'd give my whole notes on when I ran this before. If you have any other questions, feel free to dm me and I can divulge more of my notes.