Candy Crush Saga was originally released for Facebook.
King launched the game on Facebook in April 2012, initially offering 65 levels. It was adapted from the company's earlier browser game Candy Crush and combined match-three puzzles with a level-based “saga” structure. Players cleared groups of matching candies, advanced through stages, and could connect their progress with later mobile versions.
Facebook was important to the game's early growth because it provided a large social-gaming audience and built-in ways to share progress, compare activity, and support free-to-play features. Candy Crush Saga quickly became one of the platform's major games. King released iOS and Android versions later in 2012, allowing players to continue their progress across devices.
The wording “originally released” matters: Facebook was the first platform for Candy Crush Saga itself, even though King had already operated browser games and later expanded to mobile and Windows. It is also distinct from Candy Crush Soda Saga and Candy Crush Jelly Saga, which are separate follow-up titles. By January 2013, Candy Crush Saga had overtaken FarmVille 2 as Facebook's most-played game.