Here is the full list of all 10 The CW achievements worth 0 gamerscore. It takes around 15-20 hours to unlock all of the achievements on Xbox One.
Pin a show to home.
Watch a full episode on a school night (Sunday-Thursday)
Watch an episode more than once.
Watch five episodes of a show
Watch for three consecutive hours
Watch during the early morning (eg 4-6am)
Watch any 5 episodes the day after it airs.
Watch every day for a week.
Watch an extra (like an interview or behind-the-scenes special)
Watch 5 different CW Seed Show episodes