Here is the full list of all 13 Ur Game: The Game of Ancient Gods achievements.
Play at the holiday season
Play 10 times. (vs AI or Online)
Play at Halloween
Play 5 times. (vs AI or Online)
Lose against Easy AI
10 positive reactions
Invite a friend to a match
Watch video with the game rules
50 stones were reset
10 negative reactions
Play one online game
Finish a game for the first time. (vs AI or Online)
Stone taken !