Details of Call of Duty: Modern Warfare 3's multiplayer modes have appeared, courtesy of a Kotaku source.

According to the tipster, multiplayer will be split between traditional maps and co-op Spec Ops maps. As reported last week, the latter will include both a survival mode and mission-based stages.

It's thought that around 20 maps are currently being worked on, though it's not clear how many will come with the game and how many will be offered post-launch as DLC.

As with Modern Warfare 2, there are no plans to bring over Treyarch's zombie modes.

Perks and killstreaks are back, with a number of tweaks. First up, you'll be able to earn team perks. No word on exactly how this will work but it would seem to tie in nicely with the new Elite social platform announced earlier this week.

Details of four team perks were handed over by the source:

Stopping Power: Increased bullet damage
Blast Shield: Unclear
Health Regen: Regenerate health over time
Stun Protection: Prevent stunning from flash grenades
In addition to those, there'll be a number of new standard perks, reportedly including the following:

Blind Eye: This makes you immune to computer-controlled and player-controlled killstreaks. The pro version makes your launchers lock on faster and gives you extra bullet damage to vehicles.
Assassin: This makes you immune to UAV, thermal, and heartbeat sensors. The pro version also makes you immune to CUAV, EMP and no longer shows your name in red or the crosshair in red when you're targeted.
Point Guard: Every two assists count as a kill towards your killstreak.
Dead Silence: You make no noise.
Recon: Gives you a special kind of radar to spot enemies, most likely. We're not sure on this one.
As for killstreaks, the controversial Tactical Nuke has apparently been ditched. In its place are a number of new additions, including:

EMP Grenade: Temporarily takes out all area electronics
Littlebird: A tiny remote-controlled helicopter
Precision Airstrike: Calls in an airstrike on a targeted area
Stealth bomber: Calls in a B2 Spirit to carpet bomb along a line designated by the player
Remote Turret: A remote controlled turret
Directional UAV: A UAV that can be directed into areas to scan for enemies
Remote Mortar: Direct a mortar team using a zoomable camera view of the map to call in strikes
Airdrop Trap: A booby-trapped airdrop
Ammo Resupply: An ammo reloading airdrop
Escort Airdrop: A protected airdrop
Specialist Strike Package: This one remains a mystery to us
Finally, the insider claims that, as with MW2 and Black Ops, there are no plans to support dedicated servers.

The latest entry in the juggernaut FPS franchise launches on PC, PlayStation 3 and Xbox 360 on 8th November. Take a look at our recent first impressions piece for more.