Environmental Station Alpha
Environmental  Station Alpha is absolute hidden gem on Steam. It seems like it hasn't  gotten any press, possibly because of its retro-aesthetic or terrible  name, but it’s one of the best metroidvanias I've played. The shining  star of this game is how many varied and interesting bosses there are  here. The game never lets you go too long without a unique boss. 
 
Despite it being a rather large map with many ways of exploration, I  found myself not needing a guide for anything. Even 100%ing is pretty  doable, although difficult. There’s nooks and crannies everywhere in the  world despite not having any invisible walls or nonsense like that.  Each zone is so different with unique enemies. All of which challenge  the player. This isn't an easy game.
 
Plus there's a physics-based hookshot which is just awesome. All games need a hookshot.
 
The game's story is that a virus has taken over a space station and you  (a robot) have been tasked to figure out what happened. It’s pretty  straightforward. 
 
The art is all pixel graphics done really well. And the soundtrack is fantastic retro-ambient stuff.
 
Then there's the postgame. It's totally extra, and the game is  excellent without it, but it's there. This game can be 100%ed, but then  *after that* there's more. A lot more. The game goes to 206% and has a  very scary new game+ (which I gave up on pretty quick). I do not  recommend attempting the postgame without a guide, because it goes nuts.  But it is nothing like that I have ever seen before, requiring simple  cipher translation of an alien language, finding specific locations in  the station, and finding your way to locations outside the map. The  story of the postgame is no longer straightforward. You go down to the  surface of the planet, discover secrets of the aliens, and free a ghost  from the deadly white maze. It's hard to explain.
 
Funnily  enough, with all the postgame and such there's like five or six  different endings you can get, but they're all bad endings. Or they  certainly all seem bad.
 
Anyway, with or without postgame,  Environmental Station Alpha stands above so many others as one of the  best Metroidvanias I've ever played. It's a shock to me that this game  isn't more well known.

