Fallen Earth isnt a single player game. BUT, it can be. You need to adjust your perspective. I run solo 95% of the time. For me it is single player. Some mobs just have better AI than others and require different tactics.
Nar, I don't support games like these. Logout timers, time wasting events and distasteful scenario's... it's all just malware to me and I don't have the time to care.