Started a new Factorio game. First game I thought I could survive by just having a perimeter of gun turrets around my base with double walls, but I never got around to making the red ammo so they became useless as soon as big biters started to spawn. I learned my lesson so this time I prioritized military science and have been building fortified outposts at each ore patch. Been loving building the huge rail network too, going much bigger than my last game.