(So… I made the mistake of clicking on Google Drive while editing a g+ post, and lost a meaty actual play and an hour of my life, because fuck-you, Google+, you joy-stealing bundle of 20% hacks.)
So, short version: despite planning on Masks (and making up a team of four cool heroes with the girls, my son, and wife), my oldest daughter and niece ended up actually playing World of Dungeons: Breakers during our vacation (since neither son nor wife could reliably participate), BUT due to my niece's unfamiliarity with the inspirational source media for Breakers, we stepped back from wacky Ghostbuster-style-dungeon-crawling, and went for a creepy horror game (niece's request) inspired by The Secret World MMO. (Start off by pretending the events in TSW make coherent narrative sense from start to finish – a conceit Breakers easily provides – and chuck everything that doesn't support that connecting tissue.)
It worked, it was cool, and we got to fight zombies, a wendigo, and barnacle-encrusted horrors from the unknown watery deeps.
Relative links include the Breakers rules (http://onesevendesign.com/breakers_wodu_turbo.pdf), the random table of plausible character backgrounds for Breakers (https://docs.google.com/spreadsheets/d/1F_elby4nOucw0F6MwKHMtGxsCNQJ0O6JXhQ7LqB2fLk/edit?usp=sharing), and the attached map.