It's unlikely that you'll be able to play TDM without a copy of Doom 3 for the foreseeable future. TDM reuses a number of Doom 3 assets and those are not includ

It's unlikely that you'll be able to play TDM without a copy of Doom 3 for the foreseeable future. TDM reuses a number of Doom 3 assets and those are not included with the open source release of the engine.