http://bugs.winehq.org/show_bug.cgi?id=28840
--- Comment #5 from rmlipman@gmail.com 2011-10-24 10:56:11 CDT --- I had to install everything in 1.3.26, and then I could run it on more recent versions. So what worked for me was:
winetricks dotnet35 install dungeon defenders - it should install another .net which worked in 1.3.26 remove msvcrt overrides (there should be two)
Which steps don't work for you and in which version?
And I tested this in 1.3.31 and there still isn't sound. Some cutscene sounds play, but ingame sounds don't. Same as in 1.3.30.