I'm playing through KISS Psycho Circus: The Nightmare Child on PC. I played this game a lot as a kid. I'm not a fan of the band KISS at all, but thankfully the game has very little to do with the band. Looking at Wikipedia, it shows this game was based off a comic book instead.
Not many people know about this game, but it's a Quake style FPS game in the old-school sense, with a focus on singleplayer. I personally love it. π I can understand why a lot of people won't like it that much, because it gets pretty difficult in the later levels. In fact, the first level of episode three is so difficult it's almost unfair. XD But like the old Doom games, the enemies can in-fight, which makes it a lot better to fight hordes.
It's a cool game if you like old-school FPS games that almost nobody remembers. π