I have beaten both Up Your Arsenal and Deadlocked, and I am curently addicted to R&C!!!!!!! It is the most fun I've had in a game in ages. I have all the skill points in Up Your Arsenal(Not too many hard ones in it), and I've got about half of them in Deadlocked(currently on my second playthrough of the game-I got it 2 days ago but I played it on couch potato difficulty and it was sooo easy I beat it in like 4 hours.)

I love both of these games!!!!!!!