For a truly mind bending and mind boggling experience, try EVE Online. It has a deep and intriguing back story in which you participate. Everything you do has consequences and you can do almost anything. It is a persistent, 24/7 single shard, or instance universe. There is no set story line or course of action. You don’t win EVE. You partcipate in it. Check it out.
And for when you can’t be bothered with complicated stuff, there’s mining to try to earn enough ISK to get 500 PLEX so you can essentially keep all your skills and ships without having to pay.
Oh yeah, passive skills are dreadful to watch. Nearly a month to get a drone skill from 4 to 5. :(