Well, I understand, that it's not sure if a sound driver works with a game.
But if you uninstall the driver set the headset as primary and play the game shouldn't it work ?

For me it seemes like a bug.
Never done game developement, but when i would USE my Soundcard within the game i understand why it crashes.
But if i use my headset as sound device, shouldn't it be unimportant, which type of other drivers for other sound hardware i have installed ?

Because the USB headset is another driver than Sixpack sound card, isn't it ?
In my point of view the game is responsible for using the correct sound driver/library.

There should not much possibilities when uninstall/deactivate all other sound devices, except my headset.

Sorry if i made wrong conclusions, I have really no experiences in drivers and game developement^^