Cakester, bravo to you for being able to implement chatting in game through IRC. Though it's a little rough around the edges, I'm sure some work on UI could help. Or perhaps you can implement IRC features into the FO3's HUD XML? As for client-server interaction, I'm not knowledgeable on that department. However, I'm thinking that perhaps you can use script commands such as GetPos X/X/Z as well as SetPos X/Y/Z and UseWeapon-type NPC commands to Get one player's coordinates on one PC and transpose it on an NPC in another PC. I'm not sure there's a script command for Jumping, but I think it's alright to disable jumping and VATS (which I've no clue how to implement in multiplayer) in order to make a basic FO3 multiplayer work. As a side idea, what if you make a multiplayer FO3 that's not based on deathmatch? I'm thinking a space-invaders / beachhead type of game in which two players cooperate in shooting oncoming creatures from fixed positions. In any case, here's some several problems that needs to be overcome: 1. Getting player coordinates and transpositioning it in another PC 2. Getting what action one player is doing and making its NPC do the same in the other PC 3. How many scripts needed to capture and execute actions.. one script to capture coordinates, one script to capture walking action, one script to capture weapons fire and it's target, etc.