To play on L2Andromeda x50 server, you should:
1) Download Lineage 2 Interlude client (if it is not downloaded yet)
2) Download Andromeda patch!!!
3) Accounts are autocreate ingame or you can register your account via donate system.
Client:>>> Download clear client Lineage 2 Interlude (gameborder) <<<
Patch:>>> L2 Andromeda Patch <<<
Attention! Before you put the patch you must delete old folder system, and only then move all the files from archive to the client folder with the replacement.