DS1 can be played with the DLC, in multiplayer online, very easily. It's not included on Steam nor here, and that's bullshit. DS2 I never had success getting it to work for very long online (save files eventually corrupted or de-synced or something), but others have, so YMMV. ALSO has DLC, which is neither here nor Steam. These releases are bullshit and it's definitely not moral to imply this is the "full collection". I have not played DS3 much.