I find it's the little things that really get me into a game. For example, investigating the sound single gunshot off in the distance might lead the player to a corpse locked in a bathroom holding a pistol with one bullet missing from the magazine. Or several gunshots finds you a group of zombies with one carrying a pistol with no ammo. -Abandoned houses have a small chance to burn down while the power is still up. (makes sense for people to have a higher chance of leaving the oven on if their cooking is interrupted by the apocalypse) -Chance to stumble upon a partially barricaded house full of zombies, including one carrying a hammer and some nails -Chance to stumble upon the house of a lone survivalist. Looks like a normal house but upon closer inspection all the windows are curtained and boarded up. Inside is a good supply of non-perishable food, weapons and ammo and of course a paranoid, shotgun wielding home owner. (worth the risk??) -Any other glimpses into the past lives of a homes former occupants. Maybe you find the dingy hovel of Muldraugh's former town drunk, full of mostly empty whiskey bottles. Or perhaps the home of a once drug dealer, various drugs and some (useless) wads of cash scattered about. Those are just some ideas off the top of my head, would love to hear more ideas from you guys. Another thing I noticed that would really boost immersion for me is if the grass grew, since there's no one around to mow it anymore. Would definitely make things interesting as crawlers would become progressively more dangerous the longer you stay alive.