Bloons
The basic concept for Bloons came from Stephen's wife. When Stephen asked her what would be fun in a new game, she talked about  carnival games with darts and balloons. The first version of Bloons was developed quickly, and the game was released in April 2007. It proved popular, and soon reached nearly 100,000 players per day. By 2011, Bloons had been played over 3 billion times.