Space Marshals, a critically acclaimed top-down dual-stick shooter, has just gone on sale for $3.99. This is the first time this game has ever been on sale. Space Marshals is a skillful game which focuses on tactics and stealth. The graphics look fantastic, which is why it’s only compatible with the Fire TV. You’ll of course need a game controller to play, since this is a dual-stick shooter, where one stick controls your character’s movement and the other controls your weapon fire direction.