I think I should stop playing
Why would you stop?
I dream every night about getting killed by a bunch of unknown people.
You should stop playing if you are haunted by disturbing dreams. You cannot be expected to harm your mental health over a game.
I think I will be okay, I just need some new game.
I am glad that you will stop playing the game that is disturbing you. It will make you feel better to not have those dreams.