Plan the Final Assault is a mission in Rift Apart, taking place in Zurkie's. After freeing Ratchet, Clank, and Kit from Zordoom Prison, Rivet talks to Captain Quantum and the other to prepare for the final assault against Emperor Nefarious.
Walkthrough[]
At Zurkie's, the battleplex has new Gold Cup challenges from which several powerful rewards can be earned, including a spybot. Mrs. Zurkon does not sell new weapons, though all weapon are likely affordable at this point.
Talking to Quantum to proceed will be a point of no return. It is best therefore to complete as many side missions as possible now on other planets. In particular, collecting all spybots is helpful to acquire the RYNO 8. However, there is still an option to return to Zurkie's after beginning the final mission.
After finally preparing, talk to Quantum and agree to proceed to the final showdown, leading into "Defeat the Emperor", the final mission.