Single player game on Kronac's Cross. AI's all on hard, random faction. Started the game by building 3 Imperial labs (the civilian ones), researching the culture tech, and then building 2 Media Hubs. Upgraded logistics and scuttled my light factory to make room for them. Then I sat back and watched my culture take over the galaxy. Just built a few more media hubs when I could and some trade ports and upgraded my planets.

I never fired a single shot. Built no ships and the 3 that I started with never moved. Built no defensive structures of any kind.

Casualties: 2 construction frigs were killed at planets that I had taken over by culture and one asteroid received minor bombing before the faction that was bombing it was defeated when culture took their last planet.

I think that this is the fastest Sins game I have ever played. Took less than 45 minutes.