I played T2 to try the new levels... in the second half only (i.e. the new stuff) my game suddenly quit 3 times.. once per level (except the final level thankfully). Was the leader of the group, playing with one friend, who waited and we continued without problem - but rather annoying. Can't precisely say what occurred when it happened (mostly as the game quit) but might be linked to the monster spawn in new areas (maybe the sound effect) it remember hearing that as the screen blacks.

Nice new levels Devs, thanks a lot!