Came across this project from 2007 while searching an old harddrive and thought I would (finally) share. I haven't touched this since then so be prepared for some whacky code. I honestly have no idea whether this still works with phpBB3 or not.

This phpBB3 mod is direct port of hackthissite.org. Hack this Site! is a legal and safe network security resource where users test their hacking skills on various challenges and learn about hacking and network security risks. This phpBB3 mod uses the Simple_Points_System provided by Ganon_master.