you can have the game open up a webpage, using the OpenURL function, that webpage having constantly saving a file that GE reads per frame, that'd make for online
Make a variable
(PartnerX PartnerY, meh, meh)
The PHP website connects you to the partner and constantly saves the X and Y position of the connected peer, thus rendering per frame, the position on GE
Someone had this idea but i cant remember who o.o