Switching peaceful mode off in a savegame?

[Bleda]

Hi guys

I started a game in peaceful mode, but I got bored of the peace. Is there a way of getting the biters to attack me again? Maybe editing the save game directly?

[Choumiko]

Open the console in Factorio (Enter by default), type: game.peacefulmode = false
enter again and enjoy!
look at the Wiki for more commands