All afternoon (10/23) the game worked fine. I closed it to play some TF2 and tried to load my save a few hours later, but I haven't been able to load or start a new game since. I reach the leader loading screen, the voice-over goes fine and the music will continue to play, but I never actually get in game and if I try to interact I get a "program unresponsive" pop-up. I'm on Windows 10 using a Nvidia 660Ti, I've restarted my computer, reinstalled the game, cleared my local saves and verified my game cache, along with trying various combinations of video settings. The game reaches 812MB of RAM when I try to start a game but never goes above it.