Stop the Ceph rampage in New York. Our Crysis 2 Walkthrough gets you ready for multiplayer with weapons and gear, a full campaign walkthrough, and unlockables.
Mission 7 - Seat of Power
Wait for your suit to reboot and head south into the decontamination area. Make your way through to the west and jump over the ledges to hit the next objective marker. Head up to the top of the building and through the door on the other end. Grab the Stealth MARSHALL and rearm yourself with ammo.
Move outside and cloak up. Use your silenced shotgun to kill off the enemy. Move south towards the next marker, taking out any Ceph that notice you're sneaking. Move into the next building and be sure to grab the Spec Ops SCARAB.
Continue to the open area and use your visor to tag a few key targets. You'll speak with Hargreave briefly before moving south-east. Climb up the steps to reach the rails and move south to find some collectible car keys. Move down the next ramp and perch there to kill the Ceph troops. The enemy can't grasp shooting passed the banisters, giving you free reign to kill them all while standing unhidden and out of cover. Move south-west and you'll come to another set of alien pods.
Keep in the bushes and kill the enemies with silenced weapons. Eventually they will come to you, allowing the chance to armor up and smack the Ceph with melee attacks. After the fight head up the ramp on the right and grab the C4. Continue to the left and either kill off the remaining Ceph or simply sneak to the objective marker to end the mission. The heavy Ceph takes a lot of fire power, so it might be best to avoid it if you wish to hold onto your JAW or C4 ammo.