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See Also : History of Crossfire
The open source code of crossfire has been used by people, who wanted to create their own monsters, maps or skills.
Wograld source code is hosted on sourceforge : https://sourceforge.net/p/wograld
It has a summary and a blog .
: link addresses on sourceforge
Cvs access did not work for me, since the source is read-only. Using rsync, it needs then the rcs package installed, to extract it's `,v' archive files using `rcs co' , which is short for checkout.
Noteworthy the 9 Stupidities, however they have implemented these.