Sorry for the bug [report] solution in this thread but... I also had the crash to desktop when starting endless game. In my case I have a laptop with 2 video cards, intel [hd 4600] and nvidia [gt 750m]. My video card selection was set to 'automatic' and for em4.exe it was picking the intel. I forced it to always use the nvidia and it started working. Unfortunately I now have the crash to desktop after 15 minutes of play that others have been experiencing. From reading this thread it sounds like the mod developers have a patch coming out soon to address this which is great. I also would like to add that I really enjoy this mod being a volunteer fire chief and ems responder myself. Cheers, Rob