YoWorld (Formerly Yoville), is a browser-based virtual world game owned by Big Viking Games. YoWorld can only be played on Facebook. The game was initially developed by Tall Tree Games, now called Big Viking Games, YoWorld was acquired by Zynga in 2008. Zynga expressed their plans of discontinuing the game in early 2014 which sparked what could be the biggest movement in the game's history. On April 24, 2014, both Big Viking Games, Inc.