Explore as Ratchet

Explore as Ratchet, Buy the Premium Nanotech and Buy the Ultra Nanotech{{note|Technically this mission does not appear in the in-game menu mission list, but is otherwise marked as such on the map.) were missions in Ratchet & Clank. Upon acquiring the O2 Mask Ratchet was finally able to explore planet Orxon, on which he found a Nanotech vendor that sold both Premium and Ultra Nanotech. An earlier route during the mission also let him to try and catch an Infobot.

Walkthrough
Ratchet will stand in front of lone and tall platform, use this to glide down a lower plateau with a sleeping toxic crab. Encountered before, they are quite durable and their crab claws hit fast as well, so do not take them lightly in larger groups. Dispatch the power source for the barrier to run into two darters behind it, a type of flying animal that will attempt to hit you by divebombing. Their flight and attack speed makes them a bit more difficult to hit, but not a problem as long as you are aware of their position. Lastly you will notice a small blue creature sleeping amidst a trio of crabs on the next plateau, this is a screamer and it will wake up the crabs if you get too close to it. The Blaster needs but a single shot to kill it, and does so quietly as well, allowing you to more easily deal with the sleeping crabs (or even bypass entirely).

You will find a Gadgetron vendor after deactivating the barrier and a split in the path, the right leads to "Catch the Infobot", and the current mission continues left. Technically the mission encompasses both the left and the start of the right route up until the Infobot. On the right you will encounter two large groups of toxic crabs, though both can be dispatched at range. Approaching the Infobot triggers the next mission, so return and take the left path

A blarg Saucer reveals itself when you do so, occupying the end of the path and firing a continuous stream of rockets in an attempt to stop you. Use either the Devastator or Visibomb Gun to take it down and enter the structure at the end. Two blarg space commandoes guard the interior area, but are easily killed. A third space commando and four darters await you behind another barrier, as well as another Saucer, which reveals itself when you near the pipes that function as platforms. Make your way across after destroying it, causing you to run into two crabs.

Note a pipe embedded in the rock on the right, using the Blaster you can snipe a screamer. Head around the rock to run into a large group of nine toxic crabs and another screamer, either remove the latter and the two power sources to go by quietly, or take them down safely from the lone platform nearby. Be careful of the explosive crates placed on platform behind the barrier, as jumping past and moving to avoid any explosion will lead you straight into two toxic crabs. The last area is guarded by two lone space commandos, after which you can take a floating platform to reach the Nanotech vendor and ideally purchase the Premium Nanotech. Afterwards you can return to the landing pad through a nearby shortcut, leading through Clank's path.