The Developer Page:
Download methane-1.4.8.tgz Source code (filesize = 1,063,099).
Download methane-1.4.7.zip Source code (filesize = 1,035,398).
The difference between methane-1.4.7 and methane-1.4.8 is source/linux/main.cpp line 103 (removed '&')
Support Libraries Source Code:
ClanLib V0.8.0 required for LINUX. http://www.clanlib.org
MikMod V3.1.11 required for LINUX and WINDOWS. http://mikmod.raphnet.net
QTM V1.40 optionally required for RISCOS. (link unknown)
Developer Information taken from the source code:
./readme <-- Main information
./todo <-- Things to do and bugs to fix
./copying <-- GNU General Public License V2
./history <-- Source code history
./install <-- General Platform Installation Instructions
./i_linux <-- Linux Installation Instructions
./i_win32 <-- Windows Installation Instructions
./i_riscos <-- RISCOS Installation Instructions
./authors <-- Game authors
Click here for the download page. (Contains the executables)