MUD Codebase
Copper II - Historical DikuMUD Source and World Library
Copper II source, builder documentation, scripts, and companion world library, with configurable gameplay features and historical installation notes.
About this resource
Copper2-code.tar.gz contains C source, headers, a Makefile, scripts, installation notes, and documentation for creating rooms, mobs, items, zones, and programs. The documentation describes configurable jail and idle-equipment-saving behavior and Unix platform settings. Copper2-lib.tar.gz supplies the corresponding world and supporting runtime data. The documentation notes differences from base Diku area formats, so compatibility should not be assumed. Mudhaven has not compiled or boot-tested these archives. Archive provenance Both original source and library archives are staged on-site for private staff review; both components are needed. Copper2-code.tar.gz Copper2-lib.tar.gz Preserved in Internet Archive's MUD collection APR 2024. These are archived copies, not a current official release site. Each linked archive was downloaded and its SHA-256 checksum matched against the reviewed local original on October 18, 2026. Security and completeness warning The documentation describes an override-password mechanism capable of accessing player characters. Audit and disable that mechanism and review inherited account handling before running a public server. The reviewed library's players file is empty, but this is not a full security audit or a safety certification. License warning The original DikuMUD license is embedded under DOC_LICENSE in the library's help_table, while source files refer to license.doc. Some source files carry additional MERC contributor copyright notices that must be retained. Preserve all original documentation and notices, and review the full terms before reuse or redistribution. This Copper derivative must not be assumed to be LGPL merely because DikuMUD was later relicensed. Private staging is not a new license grant.
Compatibility
Historical Unix C code; needs porting and security review. Not compiled or boot-tested by Mudhaven.
A download checksum confirms file integrity, not security or runtime compatibility. Review the source and included documentation before running unfamiliar software.
Attribution stays with the work.
License
Original DikuMUD terms and contributor notices; see warnings
Original Author
Copper II contributors and the original DikuMUD team
Credits
The bundled Copper II credits name Swiftest, Dionysos, dbra, Cracker, MERC contributors Kahn, Hatchet and Furey, Key, Fleven, and others. Area credits include Calina, dbra, Edone, Fester, Prodigy, Swiftest, and Twist. MERC source notices credit Michael Chastain, Michael Quan, and Mitchell Tse. Original DikuMUD creators: Sebastian Hammer, Michael Seifert, Hans Henrik Staerfeldt, Tom Madsen, and Katja Nyboe. Preserve the complete upstream credits. The original DikuMUD license is embedded under DOC_LICENSE in the library's help_table, while source files refer to license.doc. Some source files carry additional MERC contributor copyright notices that must be retained. Preserve all original documentation and notices, and review the full terms before reuse or redistribution. This Copper derivative must not be assumed to be LGPL merely because DikuMUD was later relicensed. This listing does not grant a new license.
Download integrity
Recorded filenames, sizes, and available SHA-256 checksums for each attachment.