Missed this one yesterday, but PlanetAvP have an interview with Mike Arkin, Producer for Zono Entertainment, about upcoming console game AvP: Extinction:
PlanetAvP - AvP: Extinction is a single-player-only game, so how long are the single-player campaigns compared to most games? How much time did you put into making it?
Mike Arkin - Well, the single player missions are nice and long. It should take you 40 to 60 hours to complete the single player campaign for all three species and that is if you are really good. Each mission has optional objectives and we do offer the player an incentive to finish all the missions within the target time and finish the optional objectives, so you might spend even more time replaying the missions before the game is complete.