There are some obscenely filthy PC Engine unlicensed imports! I have a few of them, got them as part of a large deal. They're exceptionally rare, and filthy text adventures! Lots of voiceover moaning and screaming and rather graphic scenes too. They start around $50 a copy and go up cause they're so rare though! If anyone is interested, they're up for sale/trade......

Titles:
J Thunder
Crazy Hospital