a pilot program in early 2010 to explore one-off games that would explore other gameplay and storytelling approaches that could eventually be incorporated into their episodic games. The first game, Nelson Tethers: Puzzle Agent, a puzzle-solving game in collaboration with Graham Annable, was released in June 2010, while Poker Night at the Inventory, a crossover poker game featuring characters from Sam and Max, Homestar Runner, Valve's Team Fortress 2, and the webcomic Penny Arcade, was released late in 2010. Telltale followed up Puzzle Agent with a sequel, Puzzle Agent 2, in 2011. In 2013, Telltale continued the series with Poker Night 2. The Walking Dead started out as a pilot program game that was known internally as the "zombie prototype". In general, few of these games brought in large revenues, and until 2010, the founders feared that investors would suddenly pull out of the company and would force its closure. Major franchise acquisitions (2010–2016) Having established themselves as working with comedy franchises, Telltale chose to work with dramatic franchises as well as comedy series. In June 2010, Telltale announced that they had secured licenses with NBC Universal to develop two episodic series based on Back to the Future and Jurassic Park. Notably, Telltale's Jurassic Park: The Game was the first game to break away from the standard adventure game format, including elements like quick time events and time-limited choices which would become a core gameplay element in their future adventure games. Telltale obtained the license from NBC Universal to develop episodic series around the Law & Order franchise in April 2011. By 2010, Telltale had proven itself successful, with yearly revenues of $10 million, 90% greater than the previous year. Part of this was attributed to Back to the Future: The Game, which Steve Allison, the senior vice-president (VP) of marketing, called in 2011 their "most successful franchise to date". Allison stated that for most of their games, they only need to sell 100,000 copies to break even, but many of their recent releases have seen twice that number or more. The studio expanded from 90 to 140 employees. They had obtained a license in 2011 to develop a King's Quest adventure game based on the original Sierra games, but Activision took back the rights in 2013, which were subsequently used by The Odd Gentlemen to create their 2015 episodic King's Quest game. Telltale's breakthrough success came with the licenses