TSTO meaning in General ?

The Simpsons: Tapped Out is a freemium city-building mobile game for iOS and Android, based on the American animated series The Simpsons. It allows users to create and maintain their own version of Springfield using familiar characters and buildings. The game is regularly updated with new content, often season and holiday themed, for example during holidays like Thanksgiving, and Treehouse of Horror episodes-related content for Halloween. The game is available in several languages such as English, French, Turkish, Italian, German, Simplified Chinese, Peninsular Spanish and both European Portuguese and Brazilian Portuguese. The game was developed and published by EA Mobile and launched in Europe on February 29, 2012 and in North America on March 1, 2012 for iOS and February 6, 2013 for Android. The game was released for Kindle Fire devices in several markets on June 24, 2013.

According to its own estimates, EA generated over $130 million in revenue since the game's release, as of 2014. As of 2020, the game has received 80 million downloads and grossed $200 million.