Viper (2003 Video Game)
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Within the Video Game, three variants of Viper are available: the Mark I, which is designed to be an earlier version of the original series Viper; the Mark II, which is largely based on the Original Series Viper, and the Mark III, which is described as "superior to the Mark II in every respect". The Mark III is also known as the Strike Viper.
Source: http://www.galactica2003.net/
Note
The "Battlestar Galactica" video game has its own continuity as a result of its association with the failed Original Series continuation revival in 2001.