Anyone else think the crysis 2 campaign resembles that of half life 2?

I have played both games, and I believe that the campaign aspect of both of them revolves around the same idea. Any thoughts?

didnt see this...

It does a little bit. I wouldn't say the idea is the same. We still have no idea what the deal is with the aliens in Crysis. And thusfar, there is no conspiracy anywhere near the level of Half-Life (i.e. G-Man and his "employer").

i feel more like Prototype, mostly because of rooftops with watertanks

Yes I noticed that, too, but it's no bad sign. Crysis 2 story is still more about the Nanosuit and it's wearer, so that there are still enough differences.

i feel more like Prototype, mostly because of rooftops with watertanks

And because a "military force" is hunting you while you both have a mutual enemy.