Six years after its initial release, Stardew Valley has sold more than 20 million copies. The 20 million copies milestone is really amazing, according to Eric Barone, the game's creator.

The increasing pace of Stardew Valley's sales is even more impressive. It took four years for the game to sell 10 million copies. The average daily sales of Stardew Valley are higher today than at any point in the past. My hope is that the game will continue to spread via word of mouth, and more people will share the game with their friends.

Barone told PC Gamer that he plans to continue working on Stardew Valley, but that he will focus on the new game, "Haunted Chocolatier."

Twenty million copies sold is an impressive feat for any game, let alone one that a single person developed. Barone graduated from the University of Washington Tacoma with a computer science degree. He was unable to land a position in his field after the 2008 financial crisis, so he started developing a game to hone his craft. He spent the next four years working on the project before finally releasing Stardew Valley. The saga is documented in the excellent book Blood, Sweat, and Pixels.