To play on L2MultiSkill server you need a clean H5 client.
In order to play on L2MultiSkill, you don't have to register an account on the website. Accounts are autocreated inside the game on your first login.
System MultiSkill From Local (updated: 2020-06-04)
System MultiSkill From zippyshare- uploaded 2020-02-06
System From Mediafire- uploaded 2020-01-12
System From Zippyshare- uploaded 2020-01-12
System From Google- uploaded 2020-01-12