I would guess that Bluddy is correct and that this is really a hardware overheating issue. Our games tend to be more cpu intensive than gpu intensive so we are more likely to flush out this type of issue than most games.
We do have a way to cap the max frames per second which will limit the cpu usage some. Just open the console by hitting the ~ key, type maxfps 20 and hit enter, and then get rid of the console by hitting the ~ key again.
You can use a different number other than 20 if you want but this will only be useful if you pick a number that is lower than the fps you computer can normally get in the game but also high enough that the game is still playable.
You can get a fps display by typing fps 1 in the console btw.
Depths of Peril, Kivi's Underworld, Din's Curse, Drox Operative, Zombasite, Din's Legacy, & Drox Operative 2