AC2 / B had great sidequests. I did all of them in both games. ACR's Tombs are 'best in the series,' but the sheer number of collectibles they added is a bit much. They should scale that back in AC3, make it more in line with the older games and focus more on revamping the main game instead of making 'games within games.'
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"When I was a young man, I had liberty, but I did not see it. I had time, but I did not know it."