Argh, what a pain in the backside. I borrowed this game from a friend, and was really enjoying it. Got to the batcave part, and had to grab some tea. Come back to it, and my grapple doesn't work, at all. Can't escape batcave. Epic fail. Read up on grapple issue; realised that it sometimes occurs on slightly dodgy copies. Decided to buy the game off Steam, because it's good fun and worth a purchase. Install game. Still cannot grapple. EPIC FAIL. Have to start from beginning of game again. Switch on PhysX (couldn't get that before). PhysX chews frame rate up and makes game irritatingly 30fps most of the time. Gay gay gay. Gay. Gay.
The moral to the story: don't play games.