WAY more limited. I'm not lying when I'm saying this game is a straight line.
At least up to what I've played at this point. It gives you the ILLUSION of branching... but they're very short lived. It'll never let you get too far out one way, before it shows you that you need that thing from the other place that you could have went.. and then you go there, get that, and then go right back. The level design just isn't good at all, really. There's so much damn vent crawling.. it pisses me off. I don't know what they were thinking.. and it's not really scary at all. There's not