Legend of Darkness client: http://lod-nexon.ktics.co.kr/lodr.exe

Ealadh Launcher: http://www.ealadh.com/bin/EaladhLauncher.zip

Download and install Legend of Darkness from the link above. Run the launcher and click play to connect Legend of Darkness to the Ealadh server. The patch button will remove the single-instance check from the client, allowing you to run multiple clients.

If you have troubles running the game after using the launcher to patch your client, run the Repair.exe program in your Legend of Darkness folder and try patching with the launcher again after the repair program finishes.