Now acknowledged by GOG (see my ticket response below) this game has bugged controls that cause you to move to the side when you move forward and back, the degree and direction of which changes based on which compass direction you are facing. For example, face north and then move back only, you will move diagonally to the southwest. Some seem to experience this worse than others, but I have tried it on 3 PCs on 3 operating systems and it's the same on all 3. Buy at your own risk only if you can stand a control scheme that messes with you differently n a constant basis. It may not bother some people, but it's there. Reply to my ticket regarding this issue: "Unfortunately this is a known issue with the game, and every time you will press down arrow to go backwards your character will move slightly to the right as well. Some of our users informed us that they were able to bypass this issue, by using arrow keys on numpad, but unfortunately I'm not able to confirm this, because on our test PC's this issue still persisted."
I loved this game. Still love this game. Excellent (for its time) 3D visuals, engaging characters and storyline, some laugh out loud moments! (oh god the sock!) and pretty good, if easy, core gameplay) Until you get to the end. On a scale of 1 to 10, the game's difficulty in the first 99.9% is maybe a 0.5. Suddenly at the end, that ramps up to 11. I was utterly unable to defeat the final boss even knowing what to do and studying Youtube and Gamefaqs. It was impossible with my setup. Im not the only one that's found the final boss terribad. So if you don't mind a MASSIVE sudden spike in difficulty RIGHT at the end, feel free to enjoy. It's great up until then.