To play our Rookgaard: Independence OT (10.98, currently in beta), you must:

Download the client from https://rookgaard.live/
Create an account at https://rookgaard.live/register.php
The account number must be at least 6 characters long.
The password must be at least 6 characters long.
You can enter a non-existent email address.
Create a character at https://rookgaard.live/myaccount.php
We launch the client using otclient_gl.exe
In the options, you can enable WSAD walking.
To hit with the spacebar, press Ctrl+K, Add, space, Add, select "Attack next target" from the list and OK.