You can only build your bases on small patches of dirt, connected by rail.
This will force you to use available space to the max and rethink your normal layout.
Train networks are essential.
Use resources to increase the population of your patches,
to man more advanced production structures,
or to deploy as fighters to attack biter bases,
or just keep them in the vault to boost mining speed.
You will need the fighters since your only hand held weapon is the pistol.
The game is mostly vanilla, except from rail is faster and cheaper to get, and many weapons are removed.
The goal is as always to fire a rocket into space.
Message from the author
I would appreciate if you record and send me replays if you test this mod since I don't have much time to playtest myself.
Please report bugs or balance/feature suggestions.
My longest save is just over 2 hours (green science).
So the risk of undiscovered bugs and imbalance increase when you reach blue science.
I plan to rework much of the balance, and add new features in the future.
Especially combat and what you can use free population for.