Yep, you found the download section.
Instead of downloading one of the packages from below, you could also head on to the SourceForge project page and get the newest source code from SVN.
Dev Kit and Engine
SLUDGE is available in Debian starting from Wheezy and in Ubuntu starting from 11.10 in the form of the packages sludge-engine, sludge-devkit and sludge-doc. If using older Debian/Ubuntu versions, you can manually download and install the packages (Debian, Ubuntu) after manually installing libalure1, version 1.1 (and, on Ubuntu 10.04 or older, libglee0d1).
SLUDGE is available in the Arch User Repository.
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