The shrinkwrap smells nasty too. The games are old stock from a Venture store and they shrinkwrapped the games back then. So I've removed the shrinkwrap to let the boxes vent and it's nasty. The shrinkwrap stinks, the boxes stink. Everything that got in touch with the games smells nasty.
In 10 years of collecting I never got anything so nasty.
I don't know if it will ever be possible to get the smell out of the boxes, but if it will take many weeks and months.
It smells like inhaling glue!