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The first thing we see is a floating display showing class name, equipment and perk selections. It looks like there are three slots for primary weapon attachments, two slots for secondary weapon attachments, three perks and two equipment slots. Is this just appearing as a reminder to the player of what items they selected, or does it potentially link into an eSports mode so that spectators know what the player they are viewing has in their arsenal?

In the bottom right of the screen the display shows all three chosen killstreaks, and that the currently selected weapon has been set to Burst. Later in the trailer Auto and Semi-auto appears here, indicating that there will be different fire modes available.

Next we see a new type of stun grenade, with a screw-like bore attached so it sticks into the ground - making it easier to land in a specific area then a frag grenade that could roll away. This lands near an enemy and emits an electric blast that stuns them for a couple of seconds, long enough for our player to take them out.

Awards make many appearances, with icons popping up throughout the trailer. In this case the player has just taken Revenge on someone who killed them previously.

Here we see an x-ray scope attachment is being used to look through the containers ahead and spot enemies. This scope appears to be sending out pulses and detected enemies fade from view over time, so it will not allow constant x-ray vision.

'Lightning Strike inbound' appears on the left of the display, shortly before a bright beam of light flashes across the screen. This is one of many new killstreaks to be added in Black Ops 2.

Dolphin diving is back! Many players were unhappy that this feature didn't appear in Modern Warfare 3, so the ability to dive onto objectives and take cover with style will be making a welcome return.

The player activates a killstreak and places a Turret, which is actually an Active Denial System - a device that emits microwaves to cause an unpleasant sensation and is usually used to disperse crowds. This slows down the approaching enemies and seems to render them unable to return fire, making them easy pickings.

The Quadrotor drones are known as Dragonfires, and we see one being shot down with a rifle for a Flyswatter award. We then see a player piloting a Quadrotor, viewing the battlefield aerially and firing down from it to take out multiple enemies, leading to a Red Baron award.

Next we see a rocket launcher with a vehicle lock-on feature, which is being used to target and shoot down a Quadrotor. This shows that no matter how manoeuvrable and evasive the Quadrotors are, they can still be destroyed quickly with the right weapons.

A group of soldiers approach the enemy with riot shields, before planting them into the ground and using the shields as mobile cover while shooting over the top. This could add a whole new tactical element to objective based games, with players being able to create protected positions anywhere.

"Hostile A.G.R. inbound" is heard before a dropped care package opens, revealing a mini tank being controlled by one of the players that immediately shreds through a group of enemies. This suggests a high level killstreak will be required to earn this weapon, although the operator will still be exposed on the battlefield while remotely controlling the A.G.R.

The player approaches an enemy with a combat knife armed, suggesting it will only be available as a separate weapon to equip which would eliminate the melee button instakill attack of previous Call of Duty games. After getting a one-hit kill with the knife the player then receives a tomahawk in the face from a nearby enemy, showing thrown weapons also make a return.

Sniper rifles are in, and it looks like the player gets a quick-scope kill here with one. Treyarch have said that they are going to make it harder for players to do this sort of thing with sniper rifles, but clearly it is still possible. Next the player uses an unscoped sniper rifle to blast through an impressive three enemies at once, earning the 4 Piece award for four quick kills.

Next we see the player activating what appears to be a GPS-like gadget displaying location coordinates and a compass, which is then dropped on the floor. It's not clear what this device does yet but it could be used to call in supplies or a killstreak strike.

The sky then becomes chock full of Drones, which circle overhead before one dive-bombs into the ground and blows up a nearby soldier. Are all of those Drones from one killstreak, or have multiple players activated the same attack as once? A single player controlling that many Drones could wreak havoc on enemy forces.

After the title appears we get a sneak preview of Black Ops 2's eSports mode, watching the initial part of the trailer again as a spectator with running commentary by shoutcaster Mike Rufail (@hastr0). Mike announces that we are watching a "Multi-team Team Deathmatch" and at the top of the screen we see there are three different teams competing, with the player we are following getting two kills to jump their team from 3rd to 1st place. The presentation here is very slick, confirming Treyarch's commitment to making eSports a big part of Black Ops 2.