As an action platformer Environmental Station Alpha is tight. As a metroid-like it is a treat to explore. On top of this the game is filled with lots of little design decisions which alleviate problems of the metroid games; the health system alone is the best way I've seen of bridging the gap between normal players and completionists with respects to challenge I've seen of this type. This is on top of an in depth post game with countless bonus areas and bosses.