As most of us know around here know, one of the biggest advantages of PC games is customization and modding, and StarCraft 2 is no exception. Right now the number one UMS (Use Map Settings) custom game on the EU Battle.net Server is an awesome space battle map called Star Battle. It’s almost like DotA meets Star Trek. Basically, you farm small fighters to gain income to upgrade the weapons/armor/shields/engines on your giant war ship so you can destroy the other players’ giant war ships. A note for our North American users: while the custom map is now live on the US Server, not many people know about it, so nobody is playing yet.
Here is a more in depth explanation by TotalBiscuit. The video is a little long, but you get the basic idea pretty quick.