Macbook pro 15 inch (late 2013) gaming and overheating issues

So I recently bought the new MacBook pro retina 15 inch for college. But, being a $2700 machine, I'm definitely going to game on it too (And I expect it to run games fairly smooth). However, both performance and heat wise, its not performing anywhere near as well as it should.

The first game I tried was portal 2 which got around 40-50 fps on 1440 x 900 (not on max settings) and only about 4 fps less on the full 2880 x 1800 resolution. Expecting better performance from the 750m I moved on to trying minecraft because its such a simple game graphically (Don't judge! lol). Now on this I should be able to put it on max and expect a smooth 55-60 fps. It was showing 20-35... Correct me if I'm wrong but I'm pretty sure an i7, 750m, 16gb ram, and a 512gb pci-e based flash drive system should be able to render out a bunch of blocks with pixilated textures on them faster than 28 fps.

Then I noticed how hot the keyboard was getting. So I put my ear against my MacBook and I couldn't hear any fans running; though I could feel heat slowly rising out of the vents so I knew the were running, just very slowly. I feared for my extremely expensive system so I quickly downloaded a temperature gauge app and closed java. I don't know if it was launching the temperature gauge app or closing minecraft but right after I did the fans finally kicked in at full speed. The temperature app read 82 degrees Celsius on the processor.

My friend has the mid 2012 version and he can certainly run a game such as minecraft at 60fps easy. I just really hope that its some bugs with Mavericks and not my system (I do feel like Mavericks utilizes java pretty poorly or vice versa). And the fan part, that scares me. I'd rather not have that much money (and beautiful engineering) melt away.

Any thoughts on this?

Thanks for any help as to my situation too

-Kevin

Specs:

2.3GHz Quad-core Intel Core i7

512GB PCIe-based Flash Storage

GT 750m 2048mb

16gb ddr3 1600Mhz