[quote]For example Call of duty season passes last for the whole [b]year[/b].[/quote] I bolded the answer for you. CE and HoW were a DLC season pass, and a season is a year. TTK is the first actual expansion which will have another season pass, i.e. - another two DLC's spread out over the next year. Cod doesn't have expansions, they have DLC's. I can't speak to Borderlands because I didn't play it much.