"Animal Crossing, when it first appeared it was named 'Animal forest' known in Japan as Dōbutsu no Mori, is a video game series developed by Nintendo, in which the player lives his/her own virtual life in a village populated with anthropomorphic animals. The game takes place in real time, reflecting the current time of day and season. The individual games have been widely praised for their uniqueness and innovative nature, which has led to the series becoming one of Nintendo's leading franchises. As of January 2010, over 15,000,000 units of games from the Animal Crossing series have been sold."
Source: Wikipedia, "Animal_Crossing", available under the CC-BY-SA License.