Overrated? And you gave it a 9.0? WTF, Adversary16?
Crysis is very close to perfection.
Gameplay: (Good)
Is Crysis another run & gun FPS? No, mainly because unlike most shooters, Crysis rewards a stealthy approach. Then, we have the nanosuit and provided you're creative enough, is a solid tool to keep you entertained...
Editor is also available!
Gameplay: (Bad)
Ok so for me, it doesn't have much replay value because believe it or not, I always end up playing it exactly the same way. As for the difficulty, Delta is a bit easy but on the other hand, it prevents you from messing around; it kinda distracts from the fun. Lastly, the levels near the end have not been designed as the other levels in the game which IMO, were better.
Graphics: (Overall)
You all know Crysis' graphics are awesome so I'll skip that part. Instead, I'll talk about the textures. They are really great but in some parts of the game, you'll notice some really bad textures. Then, you've got the hype! It was a mistake to show off the graphics in a preview and not put them in the game. I know the requirements would have been unbelievable but still... Talking about performance, it's quite acceptable too considering how good the graphics are!
Conclusion:
Crysis is as good as it's overrated. Weird, uh?