jc175: I'll try some compressed air and see how it goes - but to be honest, I'm pretty disappointed. I can't really understand why the game runs so hot, even on the lowest settings possible. Seems more like an optimisation problem to me, seeing as performance can be fine at 60fps yet still cause overheating.
The reason you get overheating is that the game runs the GPU at full speed most of the time. If you monitor, you'll see GPU usage at 98-99% whenever there is action.
Laptops aren't built to do that, just like they aren't intended to run Folding@Home or mine for bitcoins. Especially mass market laptops like ASUS.
Nobody who does not know the game internals could tell you whether this is an optimization problem.