Painkiller is really what its name says. I loved to play it just to let some steam out. This game is an action shooter, full with blood and gore. You are a badass, killing hell-spawn monsters and huge bosses.
Back then the game had nice graphics and I loved the guns you had. You just enter a big temple and start killing huge amounts of enemies. After you kill them, you have to collect their souls, needed for health and score and what-not.
My rating for this game is:
★★★★★★☆☆☆☆