Wise words from pekson..

But talking more than 3 computers without a wall is VERY hard, basically an endless mass of attacks.

Yes it is hard but theres another trick to that ^_^...

Ah, the most computers I can handle by myself is two by not walling. Or Four by walling up. I did tried three once without walling, they all were protoss. I did pretty good, I handled off their rush well (Thank god for Firebats + Bunkers + half your resource gathering SCV on repair duty with 1 marine far ahead of your base as a scout to warn of attacks). I lasted long enough to trash the first computer down to his last few buildings before reinforcements of the other two comp came and gave me two lovely protoss footprints on my ass. I was doing fine until Protoss carriers, with scouts and corsairs of one protoss fleet hit my expansion while the other one hit my other expansion (You all know how devastating that mighty 3 unit combo can get). Once my expansions were toasted, my fleet of BCs, 1 CC with nuke silo (the other with comsat), handful of tanks and some bunkers with marines and ghost were all I had left to conquer whatever. Yeah I lost, but actually I just gave up and left the game, I dont think I could of won =(.