I've been having a feeling of hosting a slower-paced apocalyptic game of some sort. I'm thinking of a fair bit of zombies, because that's always fun, leading more and more towards a Twilight Zone-esque game tied in with a flair of the supernatural. I'm looking more for a thriller, with a good dash of horror, than hard-out gore. 

I admit this would be my first time hosting a game, and I want to think this through before starting it to make sure I can commit to one first. I ask of somebody who's into such genres and happy to have chats about plot points, who will later be a proactive Co-GM. 

This should be a High Casual to Advanced game, small to mid sized group.