http://bugs.winehq.org/show_bug.cgi?id=24013
--- Comment #6 from Berillions berillions@gmail.com 2011-09-10 04:18:29 CDT --- Created an attachment (id=36311) --> (http://bugs.winehq.org/attachment.cgi?id=36311) Assassin's Creed Dx10 crash log
I don't know if this log can help to resolv this bug.
In this log, you can see that there are differents functions which are not implemented. (Like d3d10_device_CheckMultisampleQualityLevels)
Install d3dx10 with winetricks don't resolve the problem. I have always the same error message.