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OCD are a small games design company based in SE England. Our flagship product is the obSESSION Cross-Genre RPG System but we also make a small number of card games and have plans for further expansion.

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Advanced20, abbreviated to >20 or A20, is an extensively rebuilt version of the d20 System used in the 3rd and 3.5 Edition version of Dungeons & Dragons™ role-playing game.

A20 is intended to make a more versatile game system with greater character customisability, less random results on skill, attribute and attack checks and a greater focus on player immersion and in-game narrative.

After a significant re-think of what we’ve done with A20 so far we have gone back to step one and started again. It isn’t that we didn’t have a potentially good game, it just was drifting too far from core d20 System and that wasn’t what we wanted for it.

The new direction we are taking with A20 is toi rebuild it using my favourite edition of D&D™,

The Second Edition - pulished at the end of the 1980s by TSR and written (mainly) by Dave ‘Zeb’ Cook.

The A20 open playtest has been suspended until I get a new set of documents ready, after which you will be free to download it and help to build a brand new System Reference Document.

Dragonsbane™ is a complete fantasy role-playing game set in a high-fantasy, high-magic, high-adventure world and powered by the A20 system. The game takes its name from the setting of Kurot’Ka, Land Of the Dragonsbane, a world where an ancient conflict has destroyed many of the world’s dragons and twisted the magical flows in the process. The Ahn Kurot, a race of draconic humanoids created by a fanatical archmage-turned-deity, exist to destroy their progenitor race, driven by the irrational hatred of their creator, and view the ‘lesser’ races as no more than a resource to be used in their eternal war against the few remaining dragons on Kurot’Ka. For over two hundred years Kurot’Ka was accessible to other worlds only through the dangerous passage through the Elemental Planes and the Ahn Kurot, leaderless with the sacrifice of their creator but labouring in the belief that he had ascended to Godhood, spread across the continent upon which they arrived, dominating all other life and forming the Empire of Kurot'Ka.

Dragonsbane™ takes the rebuilt Advanced20 system as its base and then adds more options specific to the setting. New feats and magic items are only the start. Character Backgrounds shape the development of your PC while the recently ended Astral Ban has shattered the power of the Gods on Kurot’Ka. Rules are presented for increasing the influence of the Gods and for repairing the damage wrought to Magic itself by the Ahn Kurot’s War of Extinction.