If I find a game too easy I just turn up the difficulty. I don't play the Assassin Creed games so I have no idea if they are easy or not. After years of playing Halo I found that normal was too easy for me in Halo 4 so now I play all Halo games on Heroic. I still play through on Legendary, but I find that a little more frustrating than just challenging so I haven't yet reached the point where Halo is too easy.
It's funny to me that people are saying that COD BLOPS is too easy. I play it on normal and the game throws bullets at me from every angle. I often die early in a firefight until I learn where all the shooters are and where to hid. I tried playing it on a harder difficult, but I got killed so fast and so much that I switched back to normal.
Maybe it's my play style. I'm very much a run and gun guy so Halo is my thing. COD is a bit more cover based so it doesn't lend itself to me running out into the fray like I always do.
