So what does this mean? Season pass holders will get all previously promised content plus one free game of their choice.
You can no longer purchase the season pass, however if you had it before and depending of which one you had here's what you can get:
Gold Edition: Extra weapons/armor, AC: China, Dead Kings + free game
Season Pass: Extra weapons/armor, AC: China, Dead Kings + free game
Regular Edition: Dead Kings DLC for free.
