I generally do not play hacks or fangames, but I made an exception for this. Really the only thing that holds this back from being as good as Zero Mission for me is a few aesthetic things like the higher-level Metroids being a bit too detailed compared to other assets. This is leagues better than the official Return of Samus on 3DS, which I have a pretty strong dislike for. I can't stand how much that game really wants to make Samus a flashy badass action game hero as opposed to the the traditional, more subdued style of previous Metroid games.