Epic has officially announced that Infinity Blade, which up until now has been known as Project Sword, will be coming to iOS devices this holiday season. The game is powered by the Unreal Engine, and has been a hot topic of conversation ever since it was teased at Apple’s keynote back in September. Some are expecting this to be the most visually impressive game yet for iOS machines.

Epic also dropped some new gameplay details, giving us our first taste of how the game will play. The company is promising that Infinity Blade will showcase “adrenaline-fueled sword battles and epic boss fights set in the realm of a fully 3D castle.” There will be at least some RPG element to the proceedings, as players will gain experience, build stats and buy new items as they progress through the story. We also know that the final boss is called the God-King, which is either pure awesome or a shining example of how lazy some people have become.

One down note is that the game won’t have multiplayer at launch, but the good news is that it will eventually come as a free update down the road. Since we don’t yet have a firm release date for the game proper we also don’t know when the multiplayer will show up, but we’d guess it will arrive in early 2011. There’s also been no price announced yet for Infinity Blade, but given the production values and development costs it’s likely going to retail for more than $0.99.

You may also want to invest in a convenient charging solution for your iPhone or iPad, as Infinity Blade will most surely be a battery hog. Enjoy playing the game in five minute spurts; that’s likely about all you’re going to manage to get out of something so resource taxing. Let’s just hope your device doesn’t die in the middle of the final fight with the God-King, because that would just be tragic.

[via TouchArcade]