My first impression, was of shock and awe. Like the FASERIPodedia, there is a staggering amount of content with a mind-boggling range. And it varied from great charts and frameworks upon which to hang an adventure (or series of adventures) to settings and 'denizens of the deep' that ranged from "cool, I recognise those", to "what the act f&%, the author must be high"... until a few minutes of internet research confirmed that, yes, ALL of the content is grounded in what has come before; comics and fiction sources that fans of the "worlds below" genre (or anyone willing to do internet research) will recognise. Yes, it is playable, adhering to the author's principles of creating a game structure that is simple enough to be easily picked up and robust enough to support complex themes and situtations. Yes, it is entertaining in allowing a flowing rollicking story for players with an enormous amount of genre specific content. But what blew me away on this was the hidden gems of hidden history. Do yourself a favour and do a few internet searches on the content; more than once, entries I assumed were from old comics or fiction turned out to be references to history or events from our own cultural past. Sprinkling a few of these Easter Eggs into the game will give a great flavour of realism to a game of monsters, dangers and heroes.