Blizzard Entertainment finally releases a playable demo for the Windows and OS X editions of their real-time strategy, StarCraft 2: Wings of Liberty.

"If you haven’t yet experienced the intense strategic combat of StarCraft II: Wings of Liberty, you can get into the action today with the newly released demo edition. Featuring full access to the first three missions of the single-player campaign, as well as unlimited access to skirmish mode as the terrans versus an A.I. opponent, the free demo gives you an introduction to the cinematic storytelling and fast-paced gameplay of StarCraft II."

Bear in mind, you are not required to have a Battle.net account, albeit you have to give your name, e-mail address and date of birth in order to grab the 1.56GB demo.