As the history suggests, several groups have stolen the rules and modified them to their own nefarious purposes. Here are the ones known to the KGB:
- The "Classic" rules, in use at Carnegie Mellon until 2007. These trace their lineage directly from the original rules.
- Version Too Point Eau, the rules currently in use at Carnegie Mellon after being rewritten to handle larger games.
- The early "Harvard" rules, based off of the classic rules
- The "Vericon/HRSFA" rules, which includes three(!) teams.
- The CtFwS in the Park rules, which adapts the Too Point Eau rules to be played outside in Golden Gate Park.