By Malathi Nayak SAN FRANCISCO (Reuters) – Activision Blizzard Incs latest title from its blockbuster Call of Duty video game franchise surpassed $1 billion in retail sales a day after its launch, the company said on Wednesday. Activision shares were relatively unchanged at $16.63 in early afternoon trade on the Nasdaq. The franchises tenth installment Call of Duty: Ghosts, a gritty military-themed shooter game, was released worldwide on Tuesday. In cities like London and San Francisco, excited Call of Duty fans queued up at retail stores at midnight launch events.