Here is the full list of all 9 ReddX achievements worth 0 gamerscore. It takes around 80-100 hours to unlock all of the achievements on Xbox One.
Upvote 10 posts bringing its link Karma from 0 to 1.
Downvote 10 posts bringing its link Karma from 1 to 0.
Upvote over 500 comments.
Downvote over 500 comments.
Lurk on ReddX for over an hour without logging in to Reddit.
Browse ReddX for over 100 hours.
View over 1000 posts.
Comment on over 100 posts.
There's got to be a subreddit that unlocks this...