So, I originally thought the trainer was crashing my game...no such luck. Turns out there is a KNOWN issue that if you have a GTX 690 and a Win 7/8 64-bit system, the game will just crash...awesome. This is from the 310.70 release notes, under the known issues section:
"[GeForce GTX 690][Hitman: Absolution]: The game crashes. [1179319]"
--------------------------------------------------------------------------- Intel Core i7 3930K EVGA GTX 690 4x4GB Corsair Vengeance DDR3-1600 ASUS Xonar Phoebus Soundcard Windows 8 Pro 64-bit Corsair Obsidian 800D w/ Custom Water Cooling
So, I decided to give it another go, but this time completely turned MSAA off, leaving all other settings untouched. So far, I've been able to complete the 1st and 2nd levels with no crashed and am still playing... So it appears that that is where the issue lies.
--------------------------------------------------------------------------- Intel Core i7 3930K EVGA GTX 690 4x4GB Corsair Vengeance DDR3-1600 ASUS Xonar Phoebus Soundcard Windows 8 Pro 64-bit Corsair Obsidian 800D w/ Custom Water Cooling
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