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Aquilae: Bestiary of the Realm: Digital Bookshelf (OSR)Click to magnify

Aquilae: Bestiary of the Realm: Digital Bookshelf (OSR)


Short & Sweet: This bookshelf compiles both Volume 1 and Volume 2 that brings together every monster published for Pathfinder, painstakingly and rigorously converted to OSR format.  It also adapts each and every monster so that it can be used with adventuring parties of ANY level.  1,660 monsters, 6,624 complete statblocks, ready to use in ANY OSR adventuring campaign.

Aquilae: Bestiary of the Realm is the largest, most comprehensive, most flexible, and most ambitious fantasy roleplaying bestiary ever conceived.  6,400 complete statblocks, comprising 1,600 monsters, each creature is given the Quadded Statblock treatment, enabling them to be used in any campaign setting, with PCs of any level.

After enormous initial success with editions for Pathfinder First Edition, Pathfinder Second Edition, 5E/Fifth Edition, and now, OSR.

Add to this a thoroughly innovative and massively expandable AI system to guide monster behavior, and you have what just might be the most impressive and valuable creature resource ever to hit Pathfinder, 5E, Pathfinder Second Edition, and OSR.

(Please note that Aquilae: Bestiary of the Realm in its entirety is a 2-volume set.)

This book is intended to be any or all of the following:

  1. An authoritative listing of monsters for use in any campaign setting, for adventuring parties of any size, and any level.
  2. A means of using any existing monster with adventures of any level and difficulty.
  3. A compendium of newly-created monsters, born of inspiration from existing beasties you may already know and love.
  4. A single-source reference and repository, listing every single possible monster in easy-to-reference alphabetical order.

This book is immensely valuable for GMs who want to introduce a truly formidable amount of creatures into their campaign, and to do so in a flexible manner.

  • Prep Time: Aquilae: Bestiary of the Realm is a peerless resource for GMs who want to minimize preparation time, or who want to through new, unexpected combinations of monsters at their players.
  • Crunch: There is no other work that assembles, generates, and makes available this level of pure crunch, of instantly-usable gaming statistics in an accessible format.
  • Single Point of Reference: Each monster entry is designed to be self-contained, as much as possible: in nearly all cases, you should be able to use the creature’s entry on its own, without referencing any other publications or materials.
  • Flexibility: If you’ve always been frustrated by the restrictions of a given adventure being appropriate only “for levels 4-6”, then this bestiary is for you!
  • Rigor: Each and every one of the statblocks in this tome was constructed using published game mechanics, templates, rules, and resources. Most have been playtested in actual gaming groups, or simulated in extensive combat scenarios across a range of PC compositions, levels, and sizes. Although every single monster is not going to pose the identical challenge to every party—see “Weaknesses”, below—every creature is constructed as best as possible to represent that monster at that level of difficulty.
  • Intelligence: FlexAI is a revolutionarily complex, yet accessible, means of simulating dynamic, contextually-appropriate monster behavior in combat encounters. Each and every monster includes full FlexAI rules, including its combat Role and variation, so you know how it is likely to behave in combat. This mechanic and approach takes the place of the somewhat more pedestrian “Combat Behavior” description that most bestiaries include alongside statblocks. This concept is explored in full, with hundreds of additional resources and references, in the FlexAI Guidebook, usable on its own, or as a valuable companion tome to this bestiary.
  • Novelty: Of the 6,400 complete statblocks in this bestiary, 4,800 of them are entirely new, forged using existing game mechanics, guidelines, templates, resources, and rules. A full 75% of the creatures described herein were created solely for the purposes of letting GMs use monsters for party levels above, or below, the levels “intended” originally when the monsters were published to begin with. In this sense, this work is not only an assemblage of monsters in a single repository, but also the single largest source of new creatures ever conceived.
  • Thoroughness: Every monster. Ever. Assembled in a single place.
  • Integration with FlexTale: All Infinium Game Studio adventures and other products use the FlexTale approach to adventure content. This innovative approach attempts to make all adventure content accessible and appropriate to all PC parties, of all levels. Aquilae: Bestiary of the Realm enables FlexTale support for every monster, ever published.
  • Making Existing Adventures Dynamic: If you have published adventures that do not use the FlexTale approach, you can use this bestiary to adapt them to parties of any level.
  • Construction: Each and every monster has been “built” or “constructed”, rather than simply fabricated. The meaning here is a little obtuse, so in more detail: each monster has been incarnated from its starting statblock, and then modified up and down as appropriate to generate the resulting quartet of statblocks you find herein. Hit dice have been modified, feats granted, and other tricks to produce contextually-appropriate scales of challenge. Statblocks have not simply been “fiddled with”, but rather templates and other tools have been applied to generate the results you see. It would have been easier—SO MUCH easier!—to simply fabricate statblocks and boosts, but this approach results in much richer and more true-to-the-rules mechanics.


This product incorporates several innovative and creative tools your gaming group can use to use the content for a party of any size, and any level.

Infinium Game Studio has released several free booklets as rules accessories to help GMs understand (or to help prospective buyers experience) these tools:

Quadded Statblocks for Variable Challenge:

Check it out here.

FlexAI Guidbook Free Sample:

Check it out here.

 Customers Who Bought this Title also Purchased
Reviews (1)
Discussions (2)
Customer avatar
Jayme A January 09, 2023 3:32 am UTC
Is there a difference between this and the vol. 1 and 2 sets purchased separately??
Customer avatar
J. E January 10, 2023 12:22 am UTC
Nope! Same content. This listing does contain the single-volume Abridged file in case that's helpful but the volumes 1 and 2 are identical to the separately-purchased listings. Hope that helps!
Customer avatar
Jayme A January 10, 2023 1:55 am UTC
Thank you so much for the quick reply. So it's both Vol. 1 and 2 and also the abridged?
Customer avatar
J. E January 10, 2023 1:57 am UTC
Yep, it's Volume 1, Volume 2, and the single-volume Abridged in this Bookshelf.
Customer avatar
Jayme A January 11, 2023 3:53 am UTC
That is fantastic. Thank you. I’m gonna have to make that purchase
Customer avatar
Rachael S November 24, 2020 12:48 pm UTC
noted "each fdsfddsfdsgiven the Quadded Statblock treatment" what is fdsfddsfds?
Customer avatar
J. E November 24, 2020 3:10 pm UTC
Fdsfddsfds is the most abhorrent, merciless monster ever featured in a fantasy RPG. Crude, rude, and utterly without morals, he appears as a wriggling visage of pure chaos, his grubby tentacles affecting and besmirching everything he comes near.

See through the illusory facade, however, and his true nature is revealed: my 3-year-old son, who mashed the keyboard while I wasn't looking.

Listing description has been corrected. Thanks for pointing out the error! :)
Customer avatar
Rachael S November 26, 2020 3:28 am UTC
LOL...well now i'm too scared of the dreaded "fdsfddsfds"!!!!! I may never type again.... LOL... have a great holiday !!!
Customer avatar
Mike H January 09, 2023 11:37 pm UTC
Negative! I now require an entry for this fearsome wee beastie, this Fdsfddsfds.

Attacked thru the 3rd wall and attacked you in your study you say! Wild, chaotic indeed. Good thing you ducked behind your board of keys!

Full statblocks and write up now required. You can not just tease us like this!
Customer avatar
J. E January 10, 2023 1:20 am UTC
(keep in mind that the dreaded Fdsfddsfds is, in this context, my 3-year-old son)

Small aberration, neutral
Armor class 10 (natural armor)
Hit Points 7 (1d10+1)
Speed 10 ft.

DEX 18
CON 14
INT 13
CHA 24

Saving Throws CHA +4, DEX +2
Senses Passive Perception 14, Tremorsense
Languages Common
Challenge 1/4

Cuteness. Any creature must make a WIS save in order to take any action against the wishes of the Fdsfddsfds. If the creature is directly related to the Fdsfddsfds, it makes such saving throws with disadvantage.

Attack. Melee Weapon Attack: +2 to hit, reach 2.5 ft, one target. Hit: Slobber. Slobbered creatures suffer an additional -2 penalty on their Cuteness saving throws against the Fdsfddsfds.

Flail About. Melee Weapon Attack: +3 to hit, reach 5 fit, one target. Hit: Disrupts the intended actions of the struck creature....See more
Customer avatar
Rachael S January 12, 2023 10:48 pm UTC
that Armor Class is off... that DEX would make him AC 16.

I love it the Immortal Fsdfddsfds will forever be remembered..... (seriously, place this stat block in everything you publish)
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This title was added to our catalog on November 06, 2020.