"The Linux version of World of Goo is finally ready for
download! It's available exclusively from our site, in three
different packages depending on what your computer likes. (tar.gz,
deb, rpm)
"If you already got the game from our site, you can use your
same download link to get the linux version in addition to your
Windows and Mac versions. A huge thanks to Maks Verver for getting
this running on linux, and the beta testers for making sure it runs
smoothly! The full game and demo versions all available here.
"Update: Yes, still DRM free! And works on 64 bit systems
too."