There is a game called Lineage 2, its a Korean MMORPG using the point and click movement, runs using the Unreal engine and is 3D and has been going in Pay to play now for many years, even longer then World of Warcraft by far. There is a Java Server server (the guys who wrote it only knew java) which allows anyone to run a server and play the game without paying a monthly fee for the real thing. This quick story is my few days stabbing at a laptop trying to get it to work.
Came across one of these the other day and found it quite an interesting idea for business needing a very small form factor computer which can be fitted behind a monitor / TV to drive a simple application. The goal of this machine is not power due to it been driven by an Atom CPU but its very small indeed and has the power supply fitted inside (no power brick).