NetherRealm Studios are back in the 'rasslin business! The developer released the free fighting app WWE Immortals earlier this month - just in time for the annual Royal Rumble! We think it's such a swell game, we're celebrating with our own take on the WWE classic - and we need you to make it work!

We'll be asking "Who's Next?" when 30 Kombatants are drawn randomly at regular intervals to enter the first ever Mortal Kombat: Royal Rumble!

It will all go down tomorrow (Sunday) - with the Fan Koliseum deciding characters' fates by voting for eliminations on the forum, and boosting their chances via Twitter! Better still, every participating fan will go into the draw to win themselves a limited edition Mortal Kombat kollectible pin! Here's what you need to know:

Mortal Kombat - Royal Rumble Rules:
• 30 Kombatants will be drawn randomly to enter at regular intervals.
• The MK Royal Rumble will begin when #1 & #2 are announced.
• Each entrant will be announced via @MK_Online & the forum.
• Kombatants begin with 12 elimination points.
• For every 5 Retweets & 10 Favorites a Twitter entrance receives - the corresponding character will gain +1 elimination points. [Tallied during each subsequent entrance.]
• Fans will vote to eliminate active characters by posting to the forum.
• An elimination occurs when the voting tally exceeds a characters points total.
• Fans can vote for an elimination once per entrance: Points will remain subtracted, but a new entrance will grant users the right to vote again for any character they decide.
• Eliminations will give points to randomly assigned eliminators.
• There must always be at least 1 kombatant active.
• Kombatants remaining after the 30th entrant will be systematically eliminated based on their points and the total Retweet & Favorites received.
• In the tradition of the Royal Rumble - expect surprises! The 30 entrants will be drawn randomly from a total field of 85 characters!
• Prize winners will be notified within 48 hours.

Mortal Kombat X is less than 7 months away! Even as the April release date and pre-order bonus draw nearer - there remains much to be discovered about the reboot sequel's fundamental elements! The playable cast continues to be a source of new speculation, but one of the overarching mysteries introduced during June's E3 unveiling is the identity of the final boss!

Every fighting game needs a memorable final challenge. Mortal Kombat has enjoyed some of the genre's best bosses - MKII & MK3's Shao Kahn still looming large since his introduction more than 20 years ago!

Series co-creator Ed Boon says MKX's boss is: "a fun surprise returning character" and "[not] a lot of people will see it coming". He's eliminated a few contenders along the way, blatantly ruling out Goro, and supressing suspicions about Kotal Kahn. With this information - Mortal Kombat Online has had its finest minds on staff debating the lead suspects. After a few months of fisticuffs and consideration - the following is our Top 10 Final Bosses for Mortal Kombat X!

From the Palace Gates of Shang Tsung's Island, to the invaded streets of metropolitan Earthrealm: The more things have changed, the more they've stayed the same! The tournament called Mortal Kombat has raged for over 20 years -- and for the first time since that momentous anniversary -- the game is about to change!

June 2nd will reveal the long awaited next instalment of Mortal Kombat! As the month of May winds to a close, we have been asked a simple question in promotional anticipation: Who's Next?

We asked a very similar question this time last year! In 2013, it was Smoke who emerged from the months of debate and thousands of votes as a controversial victor! Like the warrior himself - the conclusion was enshrouded in a fog of doubt and uncertainty. With the new game mere days from launch - and new measures in place - nothing can be taken as fact! True champions must defend their title, and we must ask the question eternal: Who is the Supreme Mortal Kombat Champion?

The ultimate fan voting tournament has become an annual tradition on Mortal Kombat Online - summoning the entire fanbase to agree on a single champion from sixty-four fighters! In 2014: the event will reflect the promotional cycle of a brand new game - introducing newly revealed elements as the tournament unfolds! Read on to learn more about what it all means and how you can join in!

Back in March, Mortal Kombat Online took an overview of the winding Saga of Mortal Kombat HD. The ill fated project began life as a contemporary remake of the classic games, using new actors to recreate the original sprites in an HD digitized format. As revealed by an unnamed source who worked on the project: the game was shelved by Warner Brothers for internal reasons [full story].

Little has been made known or available from the aborted Mortal Kombat HD project, but thanks to make-up artist Tanea Brooks -- we've now got our most intimate look at some of the work that took place!

Getting an exact live-action version of the iconic Mortal Kombat arch-villain Shao Kahn has been a game of hit and miss. Surprising, given his original design was built to be worn and realized through live-action digitization.

At this year's Wrestlemania XXX event in New Orleans; WWE's "King of Kings" Triple H returned to action with the most spectacular version of his throne and mask entrance to date. As you'll see from the pictures attached below, his grim skull-faced visage and throne gird by women screams all the trappings of Outworld's Emperor! A live-action spectacle that shames the film versions with its unashamed abandon!

This time last year, Mortal Kombat Online put the call out to the entire fanbase. The purpose: to celebrate twenty years of Mortal Kombat by determining once and for all who could be called the true champion of the tournament!

After months of debate and thousands of votes it was Sub-Zero who emerged victorious! The MKII ice warrior was a worthy winner, but as any champion knows, there comes a time when the title must be defended! With 2013 marking the twentieth anniversary of Sub-Zero and the sequel he debuted in, it's almost inevitable that we ask the question anew: Who is the Supreme Mortal Kombat Champion?

From the top of the Pyramid of Argus, back to where it all began at the Palace Gates of Shang Tsung's Island: a lot has changed in twenty years of a tournament called Mortal Kombat! We gather sixty-four kombatants and put the call out to the entire fanbase! It is up to you to help us find the true champion! Read on for more details, including how you can win prizes!

According to the traditions of the Chinese calendar, 2012 is determined the current Year of the Dragon. If impressions are anything to go by, it was purely serendipity that made this the perfect date for the twentieth anniversary of a series so widely identified by its iconic Dragon Logo.

The origin of the Dragon Logo symbol was just one of the topics covered when Mortal Kombat Online entered in to a conversation with a man whose legacy now far exceeds his time with the Mortal Kombat franchise.

It has become tradition for Mortal Kombat Online interviews to begin with the simple question of, in their own words, who the subject is. In the case of John Tobias, introductions are hardly needed. Together with Ed Boon, Tobias is credited as being the co-creator of Mortal Kombat -- a video game dynasty that dominated arcades until their eventual demise at the turn of the millenium, and continues to rule on home consoles.

As the man responsible for creating the original characters (and premise) that have populated Mortal Kombat in its every iteration, the influence of John Tobias is felt throughout the series -- even in the latest game, which set out to reboot the franchise by rewriting its history.

Join us in returning to the original source as John Tobias discusses Mortal Kombat's origins. In Part 1, we review how the series got its start, the names and faces that nearly led it down a different path, and the impact and legacy the original games have had.

From the Palace Gates of Shang Tsung's Island, to the very top of the Pyramid of Argus: for twenty long years, characters from multiple realms have battled it out in a tournament called Mortal Kombat! Now, the kombatants face the greatest fight as we call upon the entire fanbase for the ultimate challenge!

In the early days, you could take for granted that Liu Kang would be the hero of the hour, but as Mortal Kombat has developed in complexity, the question of who truly reigns supreme becomes increasingly open to circumstance. Many characters have risen through the ranks in arcade endings, offering dozens of possible outcomes in each game, but story modes and what ifs can never truly reflect the powers of the mightiest mortals in kombat history.

With the series' twentieth anniversary mere months away, it is time for Mortal Kombat Online to vote for the very first time! We hope to gather the entire MK fanbase to answer a question that has garnered debate across three decades: Who is the Supreme Mortal Kombat Champion?

This week's edition of Mortal Kombat: Legacy completes the genesis of Kitana and Mileena began last week. As Shao Kahn seeks to complete the conquering of Edenia for good.

After three separate episodes featuring Earthrealm warriors, episode four of Mortal Kombat: Legacy shifts the focus to Outworld. Created using a combination of live action and anime-style animations the tale of twin sisters Kitana and Mileena begins this week.