Download

In order to install the game, you can either download the Chronicle:Interlude or just the SindarinLauncher.

Chronicle: Interlude Download Lineage II Sindarin (MediaFire)

After the download, extract the files to your desired destination and run system/l2.exe.

SindarinLauncher Download SindarinLauncher (MediaFire)

Extract the zip and run SindarinLauncher.exe.
If Windows shows "Windows protected your PC", click More info → Run anyway. This appears because the launcher is new, not because it's harmful.