Blizzard is a very popular company as it is responsible for some of the most played games of all time, starting with the Warcraft and Starcraft RTS titles and ending with the Diablo RPG and the hugely successful World of Warcraft MMORPG.

The company currently has four new projects underway, the sequels to Starcraft and Diablo II, another expansion for World of Warcraft, and a new unannounced MMORPG, which is led by the former executive in charge of WoW. But recently a lot of speculations appeared about a new and mysterious fifth title from the company.

These were based on two recent job openings at Blizzard, which called for “experienced client and gameplay engineers to focus on graphics and other client systems for an unannounced title.” This is rather strange, as all the other jobs have their project mentioned, even the unannounced MMO. These rumors were also fueled by IncGamers, which revealed statements from an inside source.

“An inside source at Blizzard has confirmed that the game is not a World of Warcraft expansion and not related to their next-gen MMO,” revealed the website. “The source stated this is a brand new game and they are using the World of Warcraft engine for testing purposes.”

But before you start speculating on what it might be, don't forget that this is just a rumor after all. Contacted for statements by Kotaku, Blizzard replied that “We appreciate your interest in the jobs, but beyond the information listed in the postings themselves, we can't comment on unannounced projects.”

What do you think this new project will be about? A remake of the scrapped StarCraft Ghost project or possibly something with the Lost Vikings Intellectual Property? Leave us your opinion in the comment section below.