They are, by default, you can unzip the steam workshop mods as well, turning them into regular mods. The mod folder is here: For Windows: XP and lower: documents and settings/<user name>/gaslamp games/dungeons of dredmor/mods Vista and 7: users/documents/gaslamp games/dungeons of dredmor/mods For Mac: username/Library/Application Support/Dungeons of Dredmor/Mods For Linux: $HOME/.local/share/Dredmor If you back up one step from the mod folder, there should be a steam folder, inside are files with strange names, these are your steam workshop mods, and the file format is zip, even though the extension is different. Unzip to a folder inside the mod folder above, as explained here: http://community.gaslampgames.com/t...mod-installation-guide-updated-6-5-2012.1335/