[Zomboid]

I love this and brought a copy of it to my dad's because I figured it might be something he'd enjoy, but he claimed he didn't understand it. I don't know if you really need to be into comic books for something like this, but I don't think that you do. It works on several different levels and it seems like the type of story most people could pick up and enjoy even if they're only reasonably familiar with the core characters.