Diablo 09 requires both "Diablo II" and "Diablo II: Lord of Destruction" in English.
1. Ensure that Diablo II and Diablo II: Lord of Destruction is installed.
2. Download the Diablo 09 Installer linked below.
3. Run the Diablo 09 Installer ensuring the read each step.
4. Ensure that during the Diablo 09 Install you select your Diablo II folder when prompted.
5. Open the Diablo 09 Launcher each time you wish to play Diablo 09.
If you wish to install Diablo 09 alongside Battle.net or another Diablo II Mod please ensure that you copy and paste your Diablo II folder first and install Diablo 09 to the newly copied folder. It may assist to rename the new folder to Diablo 09 so you can locate it with ease when prompted by the Diablo 09 Installer.