Both are Zombie related. SOD is about just a typical invasion where you gen have to put together a survival home, gather materials to increase the defense, build workshops, etc. then you help out neighbors and try to escape the city through connections and missions. It wasn't really as intriguing as I thought it was going to be but it was pretty cool still.
Nether is kind of similar. You're stuck in a city with Nethers that randomly spawn. To survive you must gather and stockpile Ammo, Weapons, Food & MedicL supplies. The twist? Not only can you kill computer generated zombies, but you can play in a server with up to 64 other folks and kill them for their supplies too. Sometimes you can run into friendly people who are up for trading ammo for meds or whatever else they want. I've played this game a lot more just because you feel more that you're in a survival mode because you need to stick in the shadows, watch the corners and buildings, and take into consideration your weapons you've found before venturing out.
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Well that wasn't quite a hail mary but it'll work 
