For those that haven't yet played Treyarch's latest Call of Duty: Black Ops 2, Activision is offering a free multiplayer weekend for Steam users on PC alongside a double XP weekend.

The first-person shooter's free weekend runs through until 6 a.m. Monday, May 13, with a 33 percent discount also on offer putting it at $60.29. According to the game's official Twitter, the double XP weekend is set to begin on May 11 and finish up on May 14 for all platforms including Wii U.

A new trailer has surfaced showing off the new zombie campaign featured in the second DLC map pack coming to Call of Duty: Black Ops 2. Uprising will contain not just the new zombie campaign, but also four other new multiplayer maps for players to compete on.

Four mobsters find themselves trapped on the notorious Alcatraz Island. They soon find out though that they are not alone in the prison cell blocks. Chazz Palminteri, Joe Pantoliano, Michael Madsen, and Ray Liotta star in one of the most frightening Zombies experiences yet.

The Uprising DLC will be shuffling its way to Xbox Live players first on April 17th, with other platforms to follow in the zombie conga at a later date. Check out the trailer below.

Treyarch and Activision have today unveiled the newest DLC pack to grace the war-torn Call of Duty: Black Ops 2 lands, this time offering four new multiplayer maps and a new zombie map which offers four big name Hollywood actors. Unlike the previous Revolution DLC, Uprising is looking to not include a new weapon.

Call of Duty: Black Ops II Uprising will include four new exotic multiplayer maps, plus an exciting new Zombies experience called “Mob of the Dead” that takes players to Alcatraz with four of the actors behind some of Hollywood’s most iconic mobsters, including Ray Liotta, Chazz Palminteri, Joe Pantoliano, and Michael Madsen.

“With Uprising, the team has really outdone itself again,” said Mark Lamia, Treyarch’s Studio Head. “In addition to creating four amazing new multiplayer maps, the Studio has been hard at work on the Zombies front to surpass what we accomplished with ‘Call of the Dead.’ What they’ve done this time around is nothing Zombies fans have seen before – and if you don’t believe me, just wait until you get into Purgatory.”

Each of the four maps - Magma, Encore, Vertigo and Studio - will offer new, exotic and diverse multiplayer maps set around the globe for players to destroy their opponents on.

As usual, the Uprising DLC will be available first to Xbox users on April 17 for 1200 Microsoft Points, and to other platforms at a future date. Check out the trailer below for a glimpse at what to expect in each of the new maps and the new zombie mode.

Call of Duty: Black Ops 2 will be gaining new, optional in-game purchases called Micro Items according to a recent update on the Xbox 360. Social Media Manager Dan Amrich has revealed on his official website OneofSwords that the update brings several micro-transactions that "contains either personal customizations or nice little luxuries that I’ve seen players request; none of them affect gameplay."

According to Amrich the micro-transactions will simply be things like the Personalization Packs, which will offer a unique weapon camo, three targeting reticles (one each for the Reflex, EO Tech, and ACOG sights), and a custom player Calling Card. A notable example is the Bacon Personalization Pack, which will allow players to wrap their gun up in bacon for times when hunger strikes on the battlefield. Each pack will retail for 160MS Points.

Additionally, the previous pre-order only map Nuketown 2025 will now be available for all players for free and the Nuketown Zombies level will become a single-purchase option for 400 MS Points.

Activision and Treyarch haven't stopped there, with an additional 10 Create-a-Class slots also available for purchase, giving players more customisation on the battlefield then they will probably know what to do with. The pack retails for 160 MS Points and will also include an expansion on media storage which includes videos, screenshots and emblems. More details will be made tomorrow on the official Call of Duty website so stay tuned.

In related Call of Duty news Activision has revealed that the top-eight Call of Duty: Black Ops II multiplayer teams from ANZ have been picked to virtually fight it out in the ANZ qualifiers for the Call of Duty Championships 2013 in Sydney on Friday 15th March. A total prize pool of $1 million is up for grabs, so head over to the official eSports website for more, or check out the Twitch live stream come March 15th.

If you think you're one of Australia's top Call of Duty players, Activision Australia has announced a localised system for qualifying to enter into the world Call of Duty Championships in conjunction with the Australian Cyber League.

Over March 2-3, the Australian Cyber League will be administering a short series of online qualifiers that progress to a live event final in Sydney, Australia on Friday March 15th. Both Australian and New Zealand Call of Duty: Black Ops II fans will be able to enter the first online qualifier, with seven teams vying for a chance to attend the Australian and New Zealand Call of Duty Final, presented by Activision, Xbox and EB Games.

In addition, a New Zealand only qualifier will see an eighth and final team join other qualifiers, who all earn a trip to compete in Sydney.

The two top teams from ANZ will then go onto the grand stage in Hollywood, California for the Championship finals where they'll face off against other top leagues from around the world including MLG and Europe's ESL.

The competition is open now for registration and you can find out more info by clicking right here.

Activision has today revealed that those in need of some more maps for Call of Duty: Black Ops 2 will find the Revolution DLC making its way to PlayStation 3 and PC players on March 1st.

Revolution delivers an unparalleled amount of variety and content for all types of Call of Duty: Black Ops II players, featuring four all-new multiplayer maps set around the globe:

• Hydro: Located in Pakistan, this hydro-electric plant comes complete with a lethal spillway that floods with very little warning.
  
  
• Grind: Set in a skate park in Venice Beach (the birthplace of skateboarding!), quarter-pipes and curved surfaces drive players away from easy cover and into intense firefights.
  
  
• Downhill: A ski resort in the French Alps, this snowy map is complete with a moving gondola system that can both offer cover and crush you to death.
  
  
• Mirage: Located in China’s Gobi Desert, this luxury resort has been ravaged by a sandstorm.

Alongside the multiplayer maps will also be a double-dose of zombie action, with a new map titled "Die Rise" and a new Zombies mode, "Turned" which will see players becoming the undead. Check it out in the Revolution gameplay trailer below.

With the next downloadable content pack for Call of Duty: Black Ops II about to roll-out (on Xbox 360 first, as always), publisher Activision has released a new trailer promoting its features, and apparently offering to perform your social responsibilities so that you can spend more time playing their game.

The video features actor Peter Stormare starring as The Replacer, a fellow who's job it is to cover you for Call of Duty time. Yeah, we don't really get it either, but the clip does at least show a few of the upcoming features of Revolution, which include a new zombies map, and mode that lets you play as a zombie, as well as the obligatory additional multiplayer maps and a new weapon.

Check it out below. Revolution for Call of Duty: Black Ops II launches on January 29th 2013 on Xbox 360, with PC and PlayStation 3 to follow after the usual Xbox exclusivity window.

Activision has officially unveiled the first DLC map pack for recent Call of Duty: Black Ops 2, titled Revolution. The DLC will include five new maps, one of them being zombie themed, and will also include a bonus "Peacekeeper SMG" weapon unlock.

Get a first look at "Revolution," the first DLC Map Pack available for Call of Duty: Black Ops 2. One of the most robust and diverse DLC offerings in Call of Duty history, Revolution includes four all-new Multiplayer maps, a new Zombies map, an exclusive Multiplayer weapon, and a brand new Zombies game mode.

The Revolution DLC Map Pack will be arriving first on Xbox LIVE on January 29th, with other platforms to follow. Past Call of Duty titles have seen the DLC packs roughly a month later on other platforms. Check out the official preview below for a glimpse at all the new content.

Rumours are floating around thanks to a picture snapped by user Splurs on Reddit (thanks Joystiq) that the first DLC for Treyarch's recent Call of Duty: Black Ops 2 will be titled "Revolution" and include five maps, one of them being zombie themed. The image is from an in-store promotional poster, which also dates the DLC on January 29th and touts it as an Xbox 360 timed exclusive like previous Call of Duty DLC.

The five maps included are Hydro, Grind, Downhill, Mirage and the zombie map Die Rise. What also seems to be a first for Call of Duty DLC is a bonus "Peacekeeper SMG" weapon unlock, though no real info on that. Currently Activision has not yet confirmed the rumoured DLC.

Activision has today announced that a horde of zombies have made their way to the retro-futuristic Nuketown map for FPS Call of Duty: Black Ops 2. The new map is available as a bonus for those who have purchased the Season Pass, however no mention on whether the Nuketown Zombies map will be available for separate purchase.

Some uninvited guests have arrived in the neighborhood. Fend off the undead horde in the ruins of Nuketown.

Currently only available to Xbox 360 Season Pass holders, the map will go out to other platforms in the near future. Check out the trailer below for a glimpse at the zombie-themed map.