After assembling the team, Moon Studios started creating prototypes. One early prototype was named "Warsoup", which is a first-person shooter mixed with real-time strategy elements. Another prototype was named "Sein", which mixed Metroidvania and platformer gameplay together. Moon Studios started pitching "Warsoup" to publishers. Microsoft dismissed "Warsoup" but agreed to fund "Sein", with Microsoft retaining the rights to the intellectual property. With a core team of 10 people alongside several contractors working from home, the game, which would later be renamed to "Ori and the Blind Forest", took the team 4 years to develop. The team met with each other for the first time at E3 2014, when the announcement trailer was released. "Ori and the Blind Forest" received critical acclaim when it was released in March 2015. It was also a commercial success, as it recouped its development in 7 days.