Enter any Castle(not sure if this qualifies) : Lineage 2 Submissions

Use the arrow keys and run into the door over and over, while you are running into the door, hit alt+x then "restart". Now log back in, and you should be in the castle. You can run through all the rooms including the throne room.

I would suggest bringing an escape scroll to get out of it or you can just use the same method to leave the castle.

We've known about this for months now....

I have no idea what you guys know :O