I have played four of them so far, since I only have a PS2, but loved all of them. It's pretty fun going around the universe and collecting bolts and being on a mission to destroy the bad guys to make peace. It reminds me of Super Mario Galaxy, but it is more challenging with all of the features they add into the game. My favorite would be "Up your Arsenal", they have so much added including past weapons. Ratchet and Clank also have hidden areas and bolts that you have to collect and it is sometimes a challenge to get those. The map is pretty useful as well to tell you if there's a place not yet walked on. The moves on the games are great and anyone can play them. It's also so popular, they have at least 6 games in the series, probably around 10 but not sure, but it's a great series that'll grip you to the controller. What are your thoughts on this series or one of the games?