Not really a game suggestion for PewDie. I just want to share a game / mod that I used to play a lot. But I'd like to see PewDie get panicked because of the zombies because you'll die instantly if you got hit by a zombie.
Description:
Zombies are the newest threat in Rainbow Six: Raven Shield! Based on
the popular Zombies mode from Call of Duty, the team has created a
multiplayer and singleplayer mod for Raven Shield which is based on
survival against waves of zombies. Each wave gets faster and more
difficult!
Screenshots:

Download link:
moddb.com/mods/rainbow-six-zombies
What I think about this game:
I think this game is fun and intense. Maybe this mod isn't that scary, but the thing that I like from this game is you will die instantly if you got hit by a zombie (One hit kill), that's the thing that always made me panic. The more waves of zombies you survived, the difficulty will be harder.
Description:
Zombies are the newest threat in Rainbow Six: Raven Shield! Based on
the popular Zombies mode from Call of Duty, the team has created a
multiplayer and singleplayer mod for Raven Shield which is based on
survival against waves of zombies. Each wave gets faster and more
difficult!
Screenshots:


Download link:
moddb.com/mods/rainbow-six-zombies
What I think about this game:
I think this game is fun and intense. Maybe this mod isn't that scary, but the thing that I like from this game is you will die instantly if you got hit by a zombie (One hit kill), that's the thing that always made me panic. The more waves of zombies you survived, the difficulty will be harder.