Games and films become members-only as Amazon pushes Prime

The online retailer's members' service is growing, with popular games and films moving behind the velvet rope

Amazon's push to encourage the whole world to sign up to its Prime members' service continues: the online retailer has started to make blockbuster movies and games, including Birdman and Grand Theft Auto V, exclusive to Prime members.

The walled-off products are an eclectic selection: they include the Playstation 4 editions of Rainbow Six Siege and Assassin's Creed Syndicate (but not editions for other consoles), and the Blu-ray edition of Oscar-winning movie Birdman - but not the DVD.