Hacker International

Hacker International was a Japanese developer and publisher. They released a number of unlicensed games for the Famicom and the PC Engine (under the name Games Express). Many of their games were originally made by other unlicensed developers like Thin Chen Enterprise and subsequently modified to include pornographic content. A well-known example is Bubble Bath Babes, one of the few adult NES games.

They also released a number of officially licensed PlayStation games under the name Map Japan.