The Paradox Mod Wiki & Guide

Defeat an Incursor mob that spawns at night under open skies to collect a Home Caller item, then use it to jump to the future ocean base.

You need to right-click rusty doors with grease to open them.

Nail guns shoot nails, nail shotguns and machine guns require both nails and gunpowder, and electric weapons consume stored energy that recharges at wall stations or with batteries.

You must first destroy the healing support towers around the boss with gunfire or explosives before you can defeat it, since it continuously regenerates health.