Viper (2003 Video Game)
From Battlestar Wiki, the free, open content Battlestar Galactica encyclopedia and episode guide
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".
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.