Here is the full list of all 10 NOW TV achievements worth 0 gamerscore.
Watch 10 Episodes from the Entertainment Package
Watch 25 Episodes from the Entertainment Package
Watch 3 hours of On Demand Content
Watch 15 hours of On Demand Content
Watch 20 On Demand Movies
Watch 5 Live Channels
Activate 5 Sports Passes Through the Xbox One
Activate 10 Sports Passes Through the Xbox One
Search for 25 pieces of content
Log in to NOW TV for the First Time