The story is of significance, as it details how Professor Layton met Luke Triton and introduces Layton's original assistant Emmy. An additional Adventure game known as London Life will be added along with the main game. This mode will comprise over 100 hours of gameplay. This mode was co-developed by Brownie Brown. Last Specter was released in North America on October 17, 2011. On November 25, 2011, Spectre's Call arrived in Europe. Controversially, the additional RPG game Professor Layton's London Life was not included in the European version, owing to time constraints as to translating it into so many languages.