[1]: 399  Hanrahan wrote the Traveller Core Rulebook (2008), which was able to outsell RuneQuest and become the new #1 game from Mongoose.

[1]: 402 Hanrahan helped Pelgrane Press support their GUMSHOE System by producing monthly supplements, beginning in late 2010.

[1]: 385  Cubicle 7 expanded its staff in 2011 by hiring industry insiders such as Hanrahan, Walt Ciechanowski, Charles Ryan, and Neil Ford.

[2] He also holds the position of Line Developer for The Laundry Files roleplaying game published by Cubicle 7.

[4] He has also contributed short stories to the Stone Skin Press anthologies The Lion and the Aardvark[5] and Schemers.