I love that tower defense idea. It is one of my wet dreams for there to be a tower defense game mode! Just need to add more variety of towers and mazing.

Have construction sim games really ever had "end game" content though? I do like the idea of an INSANELY entrenched boss hidden on the map. Or spawns once your factory is consuming a certain amount of electricity. That would make the most sense for Factorio and possibly the most easiest to...

I avoid using splitters on the lines of ore. Here's a pic of my smelting facility. http://s4.postimg.org/coahlabw9/Screen_Shot_2014_06_20_at_8_46_01_PM.jpg And keeping my production in a straight line so I can re-saturate with copper or iron bars if needed. It's hard to see, but there's some random ...

I like how the green targeting circle works like night vision as well.

IED Car Bomb!

Oh cool, I thought this didn't work because I tried using the same type of belt. Definitely would help in a few sections of my factory.

I wish I could setup two airports for quick automated travel between bases.

The expansion supports about three T3's a minute. The original base is about one T3/min.

Here's the end of the production line with two t3 module assemblers. I made it a little more blueprint friendly. http://s29.postimg.org/jygik2403/Screen_Shot_2014_06_24_at_9_06_09_AM.jpg There are 26 red assemblers, needed speed modules to keep up. 60 green and 14 blue assemblers, probably too many ...

Maybe something more like this? Is this what you mean?

Do you really put copper cables on a belt to move them around? Have you tried routing plates and making them on the spot to see if it is more efficient? I haven't tried that. I guess this way was just easier for me to visualize. I can keep expanding to the right, so i'll try that out. I'm wondering...

This is my first "completed" factory. I still haven't wrapped my head around trains. Also this is peace mode, I didn't like having to clear out enemies to expand. Once you get destroyer robots and mk2 armor etc it feels more like a chore than a challenge. Anyways here's some screen shots. ...

I've been using 2 Fusion Reactors, 6 Exoskeletons, and 5 Shields.