For MAC Users, does you fan run high on a 15 inch?

I just got a 15 inch macbook pro with the Radeon graphics card. And while playing league, it seems like the fan runs high and the keys get kind of hot. Was wondering if other mac users have experienced this. I took it to the Apple store and they said everything seems to be fine with the hardware. So just wondering if its normal for the fan to run high. Thanks!