How do I protect my base?

Lock everything that opens. Code Locks are better than Key Locks when you play with others — you share a code instead of a key.

Build in a quieter spot, away from the busiest routes.

Build in layers: an outer shell that costs a raider time before they reach anything worth taking.

Put automatic defences at the approaches — a gun trap in a corridor, turrets covering the doors. While placing one you'll see its range on the ground, so you can aim it at the spot that matters.

Secure the Repair Cupboard above all. Whoever opens it is authorized on your base automatically — see "What is the Repair Cupboard".

Keep valuables in more than one place, so a single breach doesn't cost you everything.