There is new leaked information on Modern Warfare 3 released by Kotaku. While Treyarch introduced Zombie Mode into the Call of Duty games developed by them, Infinity Ward has now implemented a mode similar to Zombie Mode. It is the Spec Ops Survival Mode, where hordes of enemies attack you in waves. There are other Spec Ops modes such as mission mode where you are given an objective and must take down enemies along the way.
It has also been revealed that the online multiplayer will have 20 available maps. Though there are no screen shots of the online multiplayer maps, it has been hinted that New York, London, Berlin, and Paris, which are in the single player, will be on the online multiplayer as well. There has been little footage of what the Spec Ops Survival mode looks like and what maps are available for it.
Some of the perks included in the multiplayer are Blind Eye, Assassin, Point Guard, Dead Silence, and Recon. Blind Eye gives you immunity from computer and player controlled killstreaks. The pro version allows you to lock on faster with launchers and gives you extra bullet damage to vehicles. Assassin makes you invisible to UAVs, thermal, and heartbeat sensors. The pro version makes you immune to counter UAVs, and hides your clan tag, name, and red crosshairs. Point Guard counts every two assist kills as a whole kill. Dead Silence will most likely be the same as in Call of Duty 4: Modern Warfare. Recon will be some type of motion sensor radar available on you at all times.
Some the killstreaks have been revealed which are EMP grenade, Precision Airstrike, Stealth Bomber, Littlebird, Remote Turret, Escort Airdrop, Remote Mortar, and Directional UAV. One killstreak that has been confirmed as removed is the Tactical Nuke. It has not been confirmed yet if these killstreak are not stackable like in Call of Duty: Black Ops. Modern Warfare 3 will now have team perks, which will most likely be a defensive style of perk, like Blast Shield, Health Regen, and Stun Protection. We cannot guarantee that these killstreaks will remain in the final version of the games, because it is usual that the multiplayer gets tweaked and modified before the final release. This game is just months away from its release date and we'll just have to wait to see what features will truly be released.