SPV3 is a total overhaul of the original Halo, adding new weapons, vehicles, enemies, features, graphics, extended levels, new levels, new story terminals and much much more. Featuring a total playtime of over 24 hours on Heroic and Legendary difficulties, SPV3 is the largest and most feature rich Halo campaign to date. And to top it off, it is built with gameplay as a focus first and foremost, meant to expand on yet capture what made Halo Combat Evolved one of the best first person shooters of all time.