Dungeon Crawl Classics

Dungeon Crawl Classics (DCC) is a series of role-playing game modules published by Goodman Games, most of which use the Open Gaming License (OGL) and System Reference Document (SRD) version 3.5 to provide compatibility with the revised third edition of "Dungeons & Dragons". It includes more than 73 adventures, and features celebrated game designers such as Michael Mearls, Dave Arneson, and Monte Cook, as well as classic TSR artists like Jeff Dee, Erol Otus, Jim Roslof, and Jim Holloway. The "DCC" series harkens back to early 1st edition "Advanced Dungeons & Dragons" modules in content and style.
Style.
The series' design ethos is summed up by the following statement that is included in every "DCC" module: "Remember the good old days, when adventures were underground, NPCs were there to be killed, and the finale of every dungeon was the dragon on the 20th level? Those days are back. Dungeon Crawl Classics don't waste your time with long-winded speeches, weird campaign settings, or NPCs who aren't meant to be killed. Each adventure is 100% good, solid dungeon crawl, with the monsters you know, the traps you fear, and the secret doors you know are there somewhere."
"Dungeon Crawl Classics Role Playing Game".
In 2012 Goodman Games released the "Dungeon Crawl Classics Role Playing Game" ("DCC RPG"). The company describes it as "an OGL system that cross-breeds Appendix N with a streamlined version of 3E", referring to Appendix N of the original "Dungeon Masters Guide", which listed fiction that was an influence on "Dungeons & Dragons". The "DCC" module series migrated to the new system in 2012, with the release of module 66.5, "Doom of the Savage Kings" by Harley Stroh.
The game requires the Zocchi dice set, meaning the d3, d5, d7, d14, d16, d24 and d30 dice are required in addition to the standard set of 7 polyhedrals (d4, d6, d8, d10, d12 and d20).
Third party publishers have also published material for use in the DCC RPG under license from Goodman Games.
Systems supported.
The series began in 2003 with the publication of "Idylls of the Rat King" for "D&D" 3rd edition. In 2008, using the Game System License, the series changed to "D&D" 4th edition. The series switched to the "DCC RPG" upon the new system's release in 2012.
Some adventures are also available in an "Advanced Dungeons & Dragons" 1st edition version as well as 3rd edition. Some have also been converted to "Castles & Crusades".