The Ultimate Points System is an addition to your phpBB forum, where people can gain points and also are able to spend points, of course.

This can be done in internal functions like the Bank, Lottery or Robbery modules. But, there are also existing hack, which already support this hack. These would include, among others (see the user guide included in this package):

Arcade Hack by Jeff
Formel 1 Web Tipp by Dr. Death
phpBB Gallery by nickvergessen
Sudoku by Vladimir Sokolov
Invite a Friend by Gremlin
Medal System Hack by Gremlin