Oh my god... The Anime Forum IS alive!
Well, I wouldn't call the story outstanding, but it's solid enough. It's based on a light novel series, and the Novel made quite a few time jumps. So only after a couple episodes you already have the hero at lvl70, without focusing too much on what he did to get there. But it's interesting to watch just how people cope with the fact that they are trapped in a Death Game, adjust their lives and form Guilds, with the Goal to reach the top of the tower and free everyone from this game. And since every death in the game is permanent, you have quite a few emotionally heavy moments.