A malicious line-break in the DESCRIPTION line breaks the make_desktop_entry statement in src_install(). Plus, capitalizing the first letter of ${DESCRIPTION} enables the generation of a comment that's consistent with others in menus (i.e. they seem to all start with a capital letter). Patch below. Denis.
Created attachment 107476 [details, diff] nwn-1.68-r1.ebuild.patch The patch for the above breakage.
The funny thing is that this has been bugging me for a little while, now. I didn't notice it right away, but I've been looking into it. Thanks for spotting this one, it would have taken me damn near forever!