The video above is the Ratchet & Clank 2016 Novalis Walkthrough and shows how to complete the mission on Novalis, the planet featured in Ratchet and Clank 2016.
Note: The video walkthrough was recorded while playing the game on Hard difficulty, and it covers the following objectives:
Defend the planet
Find someone to help you repair your ship
Optional: Search the caves for the hidden treasure