Macbook Pro 15" reaching 101c during games

Hello,
I recently purchased my first Mac, a 15" (The 1GB Nvidia 2.6 intel NON Retina model)  and although I don't intent it to be used alot for gaming, I have a few games I installed and tried out. The games run great, steady FPS and no lag so I'm glad about that. The concern I have is the temperature. I installed SMC fan control since I've heard alot about it and even with the fans maxed from the moment I load up WoW or D3, the temp goes up to around 100c. I've elevated the back of the Mac with small erasers, I don't have a keyboard cover or a candy shell, and it's sitting on my desk.
Coming from alot of PC gaming, I know GPUs usually run pretty hot when compared to a CPU even under proper cooling conditions... but BOILING seems a tad scary. This Mac doesn't have a bottom vent so I figure a cooling mat is not a usesul option. I ONLY will be playing games when it's at home on my desk so I am just trying to find out if I should be worried or not. I don't want the radiant heat damaging other components (and yes the chassis gets very hot especially above the keyboard near the hinges).
I've searched around for a while for threads about this, but most of what I am seeing is people worried about 85ish degrees... I'd be thrilled if it were that low!
Any advice/info would be greatly appreciated!

Was the machine doing its bonfire impression while you ran the Activity Monitor testing, or was it cool then?
It sounds as though something is kicking in after the 15-20 minutes you describe, but is not running before then. Whatever testing you do may not detect any problem if it's conducted while the problem isn't occurring. This makes discovering intermittent problems a PITA in Macs, just as it is in any other device.
Start the machine up in Safe Mode and use it for as long as it would normally take for the temperature to start soaring. Does that still happen in Safe Mode?
Create a new user account and log into it at startup. Does the problem still occur in that account?

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