I haven't expereinced any crashes, so I can't say this for the others but I absolutely loved this. I'm not much of a critiquer, but if you need to kill a good 15 minutes, this is the perfect map series for you. Being maps that was cut into a few chapters it may not be good for those seeking long gameplay, but it can be a great way to help newbies or returning players settle into the game, or for those who want to try expert mode but don't want to go through hours upon hours to get to the next area with dozens of group wipes.