My most favorite entry in the series.
Whereas the other games in the original trilogy were a mix of platforming and run-and-gun gameplay, this game goes all in on the combat. It takes away Clank, which restricts Ratchet's moveset in comparison to the trilogy, but you gain two warbots to help you earn more kills...if you can keep them alive.
The vehicle missions are also loads of fun, the landstalker in particular is always one of my more favorite mission types of any world. What's more fun than driving a mechwarrior tank to destroy your enemies and environments? How about unlocking the ability to wield your dual pistols sideways like a gangster?
The soundtrack is amazing as well, harsh and industrial. I often listen to it while at work, it's that good.
It's just a shame that pretty much the only way to play this game is to own a copy and a PS2. It would be so nice to have another platform to play this game on. Also, I would absolutely love to see what kind of crazy maps and missions the mod community can come up with to make this game even better!