this probably wouldn't be possible without client-sided scripts
in other words: it's possible but then everyone who wants to play the server would have to install the custom add-on just to play
its basically converting the mouse position on screen to world coordinates and casting a raycast in that direction. the player would be an aiplayer probably and uses setMovement to points
pretty much, it's really cool how he did the camera effect to simulate runescape though, it's almost perfect but the character should be a bit more in the center instead of to the left so much...I imagine RTB ARCHIVE did that purposely because of the GUI thats supposed to be on the right side of the screen - thinking ahead! :D