How many types of doge are there?!

2048 Walking Dead edition: http://games.usvsth3m.com/2048/walking-dead-edition-21/

Reddit comments about it:

http://reddit.com/r/thewalkingdead/comments/220yoc/addicted_so_made_a_2048_walking_dead_edition/

2048 Christina Hendricks edition: http://games.usvsth3m.com/2048/christina-hendricks--edition/

Reddit comments about it:

http://www.reddit.com/r/christinahendricks/comments/21zcag/i_made_a_christina_hendricks_2048/

2048 San Francisco version:

http://www.thebolditalic.com/articles/4661-sf-lyfe-the-game

Explanation:

http://www.businessinsider.com/sf-lyfe-game-2014-4

2048 Game of Thrones version:

http://games.usvsth3m.com/2048/game-of-thrones-edition-227/

Explanation:

http://reddit.com/r/gameofthrones/comments/23qduk/no_spoilers_2048_game_of_thrones_edition/