I'm thinking Zombie apocalypse.

- They spawn during night, but can still be present at daylight.
- They come out of the ground (the dead of the old world)
- I suspect they look like the grey 'people' that attacks a village on one of the screenshots (though as we advance more hidious ones appear)
- It would be cool if they are more frequent at the mist and less frequent around the lake.
- They would wander towards settlements and people out at night attacking them on sight.
- Large groups would wander towards the lake to spread terror.
- Around the old 'towns' (scrapyards) before the apocalypse they should spawn too in the lake area, but only at the massive pre-town areas.
- Give zombies the chances to VERY rarily to have an item that isn't craftable which is superior to crafted items.