[Skilleen]

I have played my fair share of MMOs, and the game I spent the most time exploring the world was LOTRO. (lord of the rings online) It has been 5 or so years since I played, so not sure if it is still the same, but back then they had some deeds system where each region had challenges to kill a certain amount of creatures or explore different locations and would reward you with permanent stat boosts. I remember our guild would have nights where we would group up and tackle these challenges together, those are some of my favourite memories in gaming. Sigh, growing up sucks.

[MikeTV]

LOTRO also has an equippable item ("Stone of the Tortoise") that prevents a character from gaining EXP. If I had the time to play still I would get this. The low-level content is some of the best in the game, IMO.