This game isn't that bad.
But Dark Forces also has a bad side. For a PS1 game, these are some of the worst graphics in....HISTORY. Huge, fat pixels and 2-D objects and characters, along with there terrible animation. The only 3-D object in the game are...... a couple of Imperial Tie Fighters. Did I mention the sound was bad? better than the graphics.....a bit. The sound was off a bit and when some guys died they made more of a shriek than a cry. And the music......UGH! Great songs turned techoish and then compressed make it all the better. Not techno, but..... well, theres no other way to describe it. That's about it. Oh, the AI don't understand that their in a battle sometimes, so they'll start walking a different direction until they get that their supposed to be there to die.
Sum up: If you can get passed the last-gen-graphics-before-the-ps1 and the compressed audio files, this can turn out to be a great shooter. You should at least rent it. If your up to the challenge.