20XX takes Megaman X and makes it a rouguelike. There isn't a ton to say about it because it really is almost exactly just MMX, and that can't be a bad thing. The boss designs are fun but not amazing, and the level design is challenging and there are enough variations in the procedural generation that it doesn't feel overly repetitive. Gets an extra half star because it's co-op and games are almost always more fun when shared with a friend.