Follow these steps to get connected to the Annihilus Server! We do not support piracy, so support Blizzard Entertainment and buy a copy of the game if you do not have one already!
1. Be sure you have Diablo II and Diablo II: Lord of Destruction installed, and updated to 1.12 - 1.13d, but if you have 1.14a or later installed you will need to re-install Diablo II and not upgrade, or downgrade from 1.14 as installing Annihilus over 1.14a+ will not work. Follow the instructions here to downgrade from 1.14.
2. (Optional) Make an exact copy of your Diablo II folder, This is only required if you plan on going back to normal public servers.
3. Run the Annihilus Installer found here. It will ask where you want to extract it,
you will want to extract it to your Diablo II folder (or the exact copy you made if you did Step 2) At the very end of the installer a window will ask you for permission to add the server to the registry, click yes. This is simply adding the Annihilus server to your list of Diablo 2 servers.
4. You're all set! Open Annihilus Launcher.exe from the Diablo II folder you installed Annihilus in or from the shortcut created on your desktop, and you can launch the game from there. Be sure the selected server is set to Annihilus, create an account and play!
If you have any issues installing or connecting you can post in our Help Desk forum here. We also have a stickied thread with some common issues in there as well, so be sure you check that out first!