KeeperFX is open source, and anybody can download the source code and recompile it to make his own version of the game.

Here is a wiki page with instructions on how to build the game:

That wiki page will be kept up to date, and this thread can be used for questions and discussions.

Also, it's always possible to find help on the keeperklan discord. Feel free to ask for access to the development channel there.

Outdated resources: