Tiered membership means you'll come across items and quests only available if you sign up, but even so, this game has more than enough quality free play experiences to keep you entertained.
"I'd like to talk a bit about why I like the game and offer a few suggestions for educators looking for a meaningful way into your own learning. I'm going to call this: forget about the teaching part and just play = say goodbye to an evening or more, get lost a lot, die, make stuff, break stuff, repeat. I'm going to call my gaming pedagogy: noobing it up! "