The Official Hamster Republic Role Playing Game Construction Engine, abbreviated as OHRRPGCE or OHR, is an open-source, "All-in-one" game creation system. It was designed to allow the quick creation of 2D role-playing video games (RPGs). It was originally written by James Paige in QuickBASIC and released in late 1997 or early 1998. In May 2005, the source code was released as free software under the GNU GPL-2.0-or-later, and it was soon ported from QuickBASIC to FreeBASIC and to modern operating systems.