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