I gave it a 3. It was time consuming but not difficult. Now getting 100% was adifferent story. due to glithces on all three trophies of completionist, sneaky little buggers and sucker born every minute(I got all 3 to glitch on me) I had to play the Knoxx DLC 2.5 times including split screen(harder to see things). I also did not enjoy the underdome DLC as it took forever and didn't save. That DLC wasted a whole weekend for me. it wasn't hard just long and tedious.