My introduction to Ratchet 1 Clank. I probably finished this game over 12 times.
The new game + did everything for me with so many guns to upgrade. So much variety of gameplay: shooting, platforming, exploring, 2D mini-games, driving, piloting, and so on. The defensive phases were my favorites.

If that wasn't enough, my best friend and I later discovered an awesome Splitscreen competitive Conquest mode with vehicles, mobs to deploy on large maps!