Audio is supposed to work on IE10, and indeed it has in the past. Now for some reason I'm able to repro audio not working with all my games, so I'm not sure whether this is an IE10 or C2 issue. I'm going to raise as a bug.
Edit -> Raised as a bug here: http://www.scirra.com/forum/topic63597_post390097.html
I've been working with IE10 for months now and this is the first time I've seen a problem like this with C2. Very strange. Hopefully it can be resolved soon. thehen2013-02-16 11:25:28