Downloaded game on Sunday and the game froze after a few minutes no matter what I did (playing sandbox, campaign or checking out the editors). Had to CTRL-ALT-DEL out. Same thing with the subsequent patch (1.01). Decided to wait until day 0 patch to see if the situation would change. Installed day 0 patch (1.05) and It's the same. The game starts fine but after a few minutes it simply freezes. Haven't been able to play for more than a few minutes. Freeze doesn't seem to happen after any particular action or event, it just occurs after a period of time.

I have posted debug in pastebin as per instructions at the top of this thread:

 http://pastebin.ca/1924862