Complex - I'd call Crysis 3 a singular experience if it weren't so similar to Crysis 2. But the series as a whole is truly unlike anything else out there. Sure, it being a modern first-person shooter, you can compare it to Call of Duty, Halo et al. But it really possesses a style and character all its own.
I've been on a bit of a Crysis bender lately. Within the last two weeks or so I played all three games to completion. The first and second were still fresh in my mind as I delved into the third, which made the massive changes in the series seem all the more significant. The jump from Crysis 2 to 3 is certainly less jarring than was the transition from the first game to the second; Crysis 3 is much more an iteration than an evolution. Simply stated, if you enjoyed Crysis 2, then you're going to love Crysis 3.