Challenge Mode...
	Easy weapon upgrades...
	Infinite Ammo with leveling up...
	Insomniac Museum...
	Various Trophies...

Finish the game once and start a new game to have access to Challenge Mode, you can carry out your weapons, and can get multiplier bolts.

Enter an area that features a lot of enemies. Defeat all of them except for one with the weapon to be upgraded. Allow the last enemy to kill you or kill yourself by jumping into a hazard. After respawning, your expended ammunition will be restored and your weapon will retain the previously earned experience.

Normally, with the Infinite Ammo cheat turned on, your weapons do not gain EXP. However, if you play with the Infinite Ammo cheat turned off and keep using your weapon until it has no ammo left, you can do a trick to get back up to full ammo for free. Simply turn the Infinite Ammo cheat on once your weapon has zero ammo, and fire the weapon a number of times equal to that weapon's maximum ammo count. So, if using the Fusion Grenade, fire it seventeen times with the Infinite Ammo cheat turned on, and then turn it back off. Your weapon will be back up to full ammo, and you can then use it to gain more EXP. This is very helpful in Challenge mode.

Finish the game once to have access to the Insomniac Museum, it can be accessed by the teleport in the beginning of the game.

Complete the following tasks to unlock PlayStation 4 trophy rewards.

Trophy	How to unlock
Abby Normal (Silver)	Collect every Telepathopus brain.
Cha-ching! (Bronze)	Reach the maximum bolt multiplier in Challenge Mode.
Challenging (Silver)	Complete the game in Challenge Mode.
Death By Disco (Bronze)	Use the Groovitron on every type of enemy.
Faster than a Speeding Amoeboid (Silver)	Complete the hoverboard Gold Cup on Rilgar in under 1:35.
Full Gun Rack (Silver)	Acquire every weapon in the game.
Go Speed Ratchet, Go! (Silver)	Win the Gold Cup on both Rilgar and Kalebo.
Kalebo Thunder (Silver)	Complete the hoverboard Gold Cup on Kalebo in under 2:05.
Kerwan Gladiator (Silver)	Complete the Fitness Course on Kerwan in under seventy seconds.
Master of War (Silver)	Upgrade every weapon to maximum level.
Maximising Potential (Silver)	Upgrade one weapon to maximum level.
Modder (Bronze)	Complete your first Raritanium weapon mod.
Mr. Fancypants (Silver)	Upgrade Ratchet's health to maximum level.
Safecracker (Silver)	Complete every Trespasser puzzle without using AutoHack.
Super Trader (Gold)	Complete every holocard set.
Tech Head (Silver)	Acquire every gadget.
The Hero of Heroes (Platinum)	Collect every trophy in Ratchet And Clank.
These Go To Eleven (Silver)	Unlock every modification for every weapon.
Trade Up (Bronze)	Trade in a set of duplicate holocards for a new one.
Trader In Training (Bronze)	Complete your first holocard set.
Ultimate Explorer (Silver)	Collect every gold bolt.