PGen is an open source Sega Mega Drive emulator written in C++ programming language for PlayStation 2. It is based on the Generator source code.
PGen is widely considered the only choice for a Sega Mega Drive on PlayStation 2 emulator. It is even endorsed by Datel and their Action Replay MAX product, and comes bundled with the MAX Media Creator. The original creator of PGen stopped work on the project and released the source code to the public in September 2004. Since then a few members of the gaming community have taken the source and improved its functionality. Currently the emulator allows booting and loading ROMs from either a USB Stick or the HDD.