playing warframe for a while now. they made it fun, the in game voice telling you to do stuff and sending you on missions is also the community manager in meatspace. everything in the game can be grinded through, but the premium currency purchases really saves you a lot of time and effort. Levels and gear don't matter that much, actually not at all, you can keep different gear combos to have a loadout at a particular level, which is useful in some scenarios, like pvp. So you can go from high level pvp to lower level pvp by changing your loadout. It's not open world, but instanced, though it does not feel like that, with alerts and missions constantly, this is an evolving game with regular events and it is still in Beta. There were considerable changes over the past year, so yes, this game is getting better all the time. One slightly broken thing is that there are no game servers, and everything is p2p. But found a good guild, and also a bunch of local players, so this is turning out to be a lot of fun, although I expect to wind up the game after going through a few frames/weaps instead of all of them.