Paranautical Activity (Steam, $9.99) is a FPS roguelike game that has you going from room to room shooting blocky robots. At the start of the game, you can choose what weapon you want to load in with. Over the course of the game, you can purchase powerups that give you various abilities. Its like if Doom, Binding of Isaac, and Minecraft were mashed up into one game.
Personally, I did not like Paranautical Activity. The dark rooms looked very generic, and it was hard to tell the difference between the rooms. The guns were clunky and hard to aim with. The music was very bland and seemed to be stuck in a perpetual loop, which was not timed at all to what was actually happening in the game. For example, it didn’t make sense to hear loud fight music when I was in the shop purchasing items. The blocky graphics were also very dull and lacked the charm that Minecraft’s graphics has.
Overall, if you are bored and have nothing else better to play, Paranautical Activity seems like a passable knockoff of the roguelike genre. But if you are really interested in playing roguelike games, I would definitely recommend playing something else, like Hades or Binding of Isaac.