I had to beat it. when i was a child this game was soo hard
Aiming straight was defenetly not the deal in this game much more the saving my big guns for the bosses smashing them down and blasting everything that moves.
In terms of the difficulty I would have hated this without cheats I wouldn't have had the patience to get to the end just got lost all the time, and on the hardest difficulty I just would have died lots to. very hard game. These days games have those long tutorials and long ass explanations during levels on how to get through stuff also the levels these days flow more even though they are more free to move the true 3d dynamic environments of today with big rooms and big halls mean you know where you have come from and where you are headed.