OSRIC, short for Old School Reference and Index Compilation, describes itself as "a compilation of rules for old school-style fantasy gaming...intended to reproduce underlying rules used in the late 1970s to early 1980s" . It is a role-playing game

Role-playing game

A role-playing game is a game in which players assume the roles of characters in a fictional setting. Players take responsibility for acting out these roles within a narrative, either through literal acting, or through a process of structured decision-making or character development...

. Although OSRIC never refers to this directly for legal reasons, it is intended to reproduce the rules of the first edition of Advanced Dungeons and Dragons, much like other Dungeons & Dragons simulacrums

Dungeons & Dragons simulacrums

Dungeons & Dragons simulacrums are restatements of rule-sets no longer supported by Wizards of the Coast. They are made possible by the terms of the Open Game License and System Reference Document, which allows the use of much of the proprietary terminology of Dungeons & Dragons that might...

.

The legal basis of the project is that rules may not be copyrighted, only the "artistic presentation" of those rules. OSRIC uses the Open Gaming License

Open Gaming License

The Open Game License may be used by game developers to grant permission to modify, copy, and redistribute some of the content designed for their games, notably game mechanics.-Language of the licence:The OGL describes two forms of content:...

 and the System Reference Document

System Reference Document

The System Reference Document, or SRD, is a set of reference role playing game mechanics licensed under the Open Game License by Wizards of the Coast and based upon their Dungeons and Dragons role-playing game. The SRD forms the basis of WotC's various d20 System role-playing games, including the...

 to create a new artistic presentation of the underlying rules set.

The purpose of OSRIC is to provide publishers with a tool to legally produce gaming materials compatible with the non-copyrightable aspects of the underlying rules set. Gaming materials described as OSRIC-compatible alert potential users those materials may be compatible with the fantasy rules sets of the late 1970s and early 1980s (i.e. Advanced Dungeons & Dragons).

The initial version of OSRIC was released in 2006. The latest version, OSRIC v. 2.2, was released in 2011. The OSRIC rules are free to download from the game's site in PDF form. In June 2009, hard copy versions of the rules became available from the Lulu Print-On-Demand service in 4 versions: hard bound in black and white, hard bound in color, paperback and paperback economy.

OSRIC-Compatible Resources

As of year end 2009, more than seventy-five products describe themselves as OSRIC-compatible.

Adventure Modules

Several publishers, including ENnie award-winners Expeditious Retreat Press (XRP) and 0One games, have used OSRIC to produce dozens of adventure modules. The modules listed here are all expressly branded OSRIC-compatible.
0One Games publishes an OSRIC-compatible "Master Adventures" (ITA) series.

Code	Title	Levels	Author
ITA1	Andwan Legacy	4-5	Mario Barbati
ITA2	The Minotaur	3-4 (or 1 6th)	Mario Barbati and Diego di Dato
ITA3	Deadly Ice	4-5	Mario Barbati
ITA4	The Divine Alligator	6-7	Artemis Silversmith
ITA5	Blood Runs Cold	10-12	Chad MacPhee and Grep Oppedisano
ITA6	Earth Unleashed	7	Jan Willem van den Brink

Black Wyvern Press publishes an OSRIC-compatible "Tales of the North" series.

Code	Title	Levels	Author
Vol. 1	The Raiding Party	1-3	Clint Elliott

Brave Halfling Publishing publishes OSRIC-compatible adventures.

Code	Title	Levels	Author
AW1	The Forgotten Temple of Baalzebul	13-15	Alphonso Warden
AW2	People of the Pit	5-7	Alphonso Warden

Center Stage Miniatures/Pacesetter Games publishes an OSRIC-Compatible "Advanced Fantasy Module" with complementary miniatures.

Code	Title	Levels	Author
U1	Dark Eye of the Hurrican		Bill Barsh

Expeditious Retreat Press (XRP) publishes an OSRIC-compatible "Advanced Adventures" (AA) series.

Code	Title	Levels	Author
AA1	The Pod-Caverns of the Sinister Shroom	2-4	Matthew Finch
AA2	The Red Mausoleum	12-15	James C. Boney
AA3	The Curse of the Witch Head	6-10	James C. Boney
AA4	The Prison of Meneptah	8-10	Alphonso Warden
AA5	Flaming Footprints of Jilanth	3-5	Andrew Hind
AA6	The Chasm of the Damned	6-10	James C. Boney
AA7	The Sarcophagus Legion	2-4	Andrew Hind
AA8	The Seven Shrines of Nav'k-Qar	8-12	James C. Boney
AA9	The Lost Pyramid of Imhotep	4-7	Alphonso Warden
AA10	The Lost Keys of Solitude	6-10	Joseph Browning and Suzi Yee
AA11	The Conqueror Worm	10-14	Alphonso Warden
AA12	The Barrow Mound of Gravemoor	5-7	Andrew Hind
AA13	White Dragon Run	2-4	James C. Boney
AA14	The Verdant Vault of Malakum	8-10	Alphonso Warden
AA15	Stonesky Delve	4-7	Joseph Browning
AA16	Under Shattered Mountain	9-12	James C. Boney
AA17	The Frozen Wave Satsuma	3-5	Joesph Browning & Andrew Hind
AA18	The Forsaken Sepulcher	10-14	Alphonso Warden
AA19	The Secret of the Callair Hills	3-5	Geoff Gander
AA20	The Riddle of Anadi	6-10	James C. Boney
AA21	The Obsidian Sands of Syncrates	4-7	Joseph Browning

Fifty Latches Publishing publishes OSRIC-compatible adventures.

Code	Title	Levels	Author
FLA01	The Secret of the Summoning Chamber	3-5	Delmar Watkins

Goblinoid Games publishes an OSRIC-compatible Wyrms & Warlocks adventure series.

Code	Title	Levels	Author
M1	Medusa's Hunger	5-7	Daniel Proctor

Johnny Rook Games publishes OSRIC-compatible Westgate Adventures! and Dungeon Raiders! series.

Westgate Adventures!

Code	Title	Levels	Author
APS1	Watchtower on the Hill	1-3	Dominick Pelletier
APS2	Warrens of the Great Goblin Chief	1-3	Dominick Pelletier
FRN01	Ghosts from the Dark Wood	3-6	Dominick Pelletier

Dungeon Radiers!

Code	Title	Levels	Author
JMD01	Beneath the Ghoul Lair	2-4	Dominick Pelletier

Magique Productions publishes an OSRIC-compatible "Realms of Arkonus" (RAM) series.

Code	Title	Levels	Author
RAM1	The Forgotten Isle	4-6	Thomas J. Scott
RAM2	Dark Raiders of the Misty Ridge	2-3	Thomas J. Scott
RAM3	Advent of Darkness	10-12	Thomas J. Scott
RAM4	The Magic Balance	10-12	Thomas J. Scott & J. Allan Fawcett

Pacesetter Games & Simulations publishes a First Edition/OSRIC series.

Code	Title	Levels	Author
B1	Legacy of the Unknown	2-4	Bill Barsh
C1	The Circle of Fire	4-6	Bill Barsh
I1	Grave of the Green Flame	2 (SoloPlay)	Bill Barsh
Q1	The Screaming Temple	2-4	Bill Barsh
Q2	Eruptor's Vengeance	2-4	Bill Barsh
Q3	Death on Signal Island	2-4	Bill Barsh
S1	The Haunted House of Clendil	2-4	Bill Barsh
T1	The Thing in the Valley	3-5	Bill Barsh
TM1	The Lost Caravan	5-7	Bill Barsh
V1	The Vampire's Curse	3-5	Bill Barsh

Rended Press publishes an OSRIC-compatible adventure.

Code	Title	Levels	Author
HJM1	Temple of the Ghoul	1-2	H. John Martin

Ronin Arts publishes an OSRIC-compatible "First Edition Fantasy" series.

Code	Title	Levels	Author
#1	Into the Mite Lair	3-5	Philip Reed
#2	Smuggler's Bane	5-7	Andrew Kenrick, Matt Drake, and Brett M. Bernstein

Sacrosanct Games publishes OSRIC-compatible adventure moduless.

Code	Title	Levels	Author
A1	Lair of the Goblin King	1	Roderic Waibel
A2	Lost Treasure of Actzimotal	3-5	Roderic Waibel
A3	Hunt for the Ogre Lord	4-6	Roderic Waibel
A4	Rise of the Bloodwolf	6-8	Roderic Waibel
B1	Journey to Hell	18-20	Roderic Waibel
OS1	Something Unholy Stirs	1-3	Roderic Waibel

Silver Blade Adventures publishes an OSRIC-compatible introductory fast-play module.

Code	Title	Levels	Author
N/A	Orcs' Nest	1	Matthew James Stanham

Usherwood Publishing publishes OSRIC-compatible "Usherwood Adventures" modules, the "Bone-Hilt Sword" campaign series, the Tower of Mysteries campaign series, and High Adventures from Middle School.

Usherwood Adventures

Code	Title	Levels	Author
UA1	Arachnophobia	4-6	James D. Kramer
UA2	The Awakening	8-10	Alphonso Warden
UA5	The Rebel Faction	8-12	Alphonso Warden

Bone-Hilt Sword Campaign

Code	Title	Levels	Author
BHS1	Yrchyn, The Tyrant	1-3	James D. Kramer
BHS2	The Shattered Skull	2-4	James D. Kramer
BHS3	The Shadowed Keep	3-5	James D. Kramer

Tower of Mysteries Campaign

Code	Title	Levels	Author
TM1	The Door of Infinite Portals	mixed midlevels	James D. Kramer

High Adventures from Middle School

Code	Title	Levels	Author
UAC1	The Gems of Fire		James D. Kramer
UAC2	Into the Halls of Mystery		James D. Kramer
UAC3	The Lost Atoll of the Bleu Dragon		James D. Kramer

Vigilance Press publishes OSRIC-compatible adventures for its World of Arkara setting.

Code	Title	Levels	Author
N/A	Death from Below	1-3	Charles Rice

Supplements

More than a dozen distinct publishers have produced OSRIC-compatible supplements.
Brave Halfling Publishing publishes OSRIC-compatible supplements.

Code	Title	Series	Author
N/A	Breaking and Entering: A Toolbox for Thieves	N/A	Vincent Fruge'
N/A	Valtor the Mighty	Delving Deeper	John Adams

Dragoneer Publishing publishes an OSRIC-compatible psionics combat system.

Code	Title	Series	Author
PSCA010	Osric Psionic Combat	N/A	Don Dickerson

Ed's Homebrew Product published OSRIC-compatible supplements for the World of Skybourne advanced campaign setting.

Code	Title	Series	Author
WOS1	World of Skybourne: Book 1 Mythos	World of Skybourne	Edward Kann
WOS2	World of Skybourne: Book 2 Magic	World of Skybourne	Edward Kann

Faster Monkey Games publishes an OSRIC-compatible supplement.

Code	Title	Series	Author
N/A	Turntracker	N/A	Faster Monkey Games

The First Edition Society publishes an OSRIC-compatible monster compendium and print copies of the OSRIC rules.

Code	Title	Series	Author
N/A	Monsters of Myth	N/A	Stuart Marshall and Matt Finch (editors)
N/A	OSRIC	N/A	Stuart Marshall (editor)

Goblinoid Games publishes OSRIC-compatible supplements.

Code	Title	Series	Author
AA1	Fantasy Caverns	Wyrms & Warlocks	Daniel Proctor
AA2	Fantasy Caverns 2	Wyrms & Warlocks	Daniel Proctor

Magique Productions publishes a single OSRIC-compatible supplement.

Code	Title	Series	Author
RAS1	Young Players Options	Realms of Arkonus	Thomas J. Scott

Mob United Media publishes OSRIC-compatible supplements.

Code	Title	Series	Author
N/A	1E Heroic Adventures	Olde School Arcana	Malcolm Sheppard
N/A	First Edition Feats	Olde School Arcana	Malcolm Sheppard
N/A	Olde School Monk	Olde School Arcana	Malcolm Sheppard
N/A	Olde School Swashbuckler	Olde School Arcana	Malcolm Sheppard

Ronin Arts publishes OSRIC-compatible supplements.

Code	Title	Series	Author
Supplement #1	Dungeon Hazards	First Edition Fantasy	Matthew J. Finch and Philip Reed
Supplement #2	OSRIC Unearthed	First Edition Fantasy	Charles Rice

Usherwood Adventures publishes OSRIC-compatible supplements, and a A5 print copy of the OSRIC rulebook.

Code	Title	Series	Author
RPA1	Player Character Record Sheets	Role Playing Aids	James D. Kramer
RPA2	Game Master Adventure Log	Role Playing Aids	James D. Kramer
RPG10	Usherwood Adventures Expansion for OSRIC	N/A	James D. Kramer
N/A	OSRIC	N/A	Stuart Marshall (editor)

Vigilance Press publishes OSRIC-compatible gazetteers for the World of Arkara setting and OSRIC supplements.

Code	Title	Series	Author
N/A	Gazetteer of the Known World	World of Arkara	Charles Rice
N/A	Gazetteer of the Canterbury Islands	World of Arkara	Charles Rice
N/A	Fractured Realms	World of Arkara	Charles Rice

Code	Title	Series	Author
#1	The Alchemist	OSRIC Supplements	Charles Rice
n/a	Old-School Psionics	OSRIC Supplements	Charles Rice
n/a	Old School Magic	OSRIC Supplements	Charles Rice

World Gorean Society publishes OSRIC-compatible supplements.

Code	Title	Series	Author
N/A	OSRIC Skill System	N/A	DM Paragon, Ricc Kenin
N/A	OSRIC Book of Assassins	N/A	DM Paragon, Ricc Willett
N/A	OSRIC Book of Paladins	N/A	Solid Master, DM Paragon
N/A	OSRIC Book of Clerics	N/A	DM Paragon, Ricc Willett
N/A	OSRIC Book of Druids	N/A	Solid Master

Zodiac Gods Publishing publishes an OSRIC-compatible skills supplement.

Code	Title	Series	Author
N/A	First Edition Skills	N/A	Nicholas Bergquist

OSRIC-Compatible Periodicals

The following periodicals include OSRIC-Compatible content:

"Classic Fantasy Review" by Goblinoid Games

"Knockspell Magazine" by Swords & Wizardry

"Old-School Gazette" by XRP

"Scribe of Orcus" by Goblinoid Games

"Zor Draxtau" by Usherwood Adventures