"Fusion: Genesis" was among the mysterious Xbox games rated in Australia and Brazil, the latter country specifying it as an XBLA title. A series of US trademarks found by Zunited reveals that whatever Fusion: Genesis is, it's probably part of a series.

In addition to trademarking "Fusion Genesis" (serial number 85277651, searchable here), Microsoft has filed trademarks for "Fusion Vault" (number 85277645) and "Fusion Sentient" (number 85277650), all specified as " Entertainment services, namely, providing an on-line computer game."

The three trademarks point either to some new "Fusion" series of XBLA games, or a single "Fusion" game with three potential titles that Microsoft had yet to decide on.

This article was originally published on Joystiq.