This is simple game. No story, no cutscenes, only pure violence. You need to kill as many enemies as possible or they will kill you. But they have some advantage - they will kill you, no matter how hard you will try to survive. But with every death you will be better and better and you will want to try again and again.
I remember playing that game about 10 years ago and it was a great experience. How is that now? As you can see, When I'm writing those words, I have 15 hours played and I still play it from time to time. Maybe it's not as good as it was long time ago, but it's still a good game, so I can recommend it without hesitation.
But I have to warn you, this is not an easy game.
If you're a pacifist, better stay away of this game.
But if you love to slay monsters in bloody way, you'll have plenty of fun here.