My favorite game that I have ever played. I still play Dayz a lot and sometimes I'm alone, solo surviving while dealing with other players on both official and lightly modded servers. But sometimes I'm with my friends spending time with them talking a lot along the journey and getting into intense situations together that are loads of fun. I even play this game with my father and he easily over 3000 hours and if anyone ever asked me my favorite game I would say it was this one.

Exactly what your looking for if you want a hard and very creative take on the survival experience, and plenty of mods on the workshop if you want them.

DarkRP is the best.