Ratchet and Clank 2: Going Commando - Impossible Challenge, No Armor, Starting Weapons Only
The Impossible Challenge in Ratchet and Clank 2: Going Commando with no armor and only using the Heavy Lancer, Mini-Nuke, and (primarily) the wrench. This was mainly a wrench-only run to conserve as much ammo as possible, such that the challenge was more viable. I started the challenge on my first visit to Joba with 37 nanotech health points and whenever I reattempted I would reload that manual save, so as not to accrue any more experience and to try to complete this specific challenge in its 'purest' form, e.g. with no additional health upgrades and with no visits to future planets (thereby only having the level 2 wrench found on Tabora).
Definitely a satisfying challenge to overcome with this ruleset; I certainly had a few cleaner runs previously and managed to choke right at the final hurdle with Megapede, who in hindsight would have been much quicker and easier to defeat using the Lock-On Mod for the Lancer (also available on Tabora), but where's the fun in that?
Megapede boss battle at 27:21.
Hope you enjoy!