Here is the full list of all 10 NOW TV achievements worth 0 gamerscore.
Watched 5 Live Channels
Watched 3 hours of On Demand Content
Watch 10 Episodes from the Entertainment Package
Watch 25 Episodes from the Entertainment Package
Watch 15 hours of On Demand Content
Watch 20 On Demand Movies
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