yeah, 20 years ago
this is based on the original, right? The first System Shock was amazing when it came out, but I don't think it ages well. Some of the gameplay mechanics are archaic because it was released during the advent of FPS games.
I'd try System Shock 2 (HD version) if you can't get into it. That is still playable and one of the best games ever - better than the first one.