Yeah I got lost a few times, I had to use ghost mode to find the way out of the catacombs, damn that was hidden!! I had a few problems in the Ocean Base too, a few doors I couldn't see a way to open and then there was a switch hidden amongst the cosmetic panels that was really hard to spot. Also right at the end where you have the giant spider bot there is an elevator that you call down in the original game but I couldn't find any way to call it in the revision (the button doesn't work) Had to cheat there too. Overall though a great project and wonderful to play it through again.
My vision is augmented.