Epic Games and Chair Entertainment on Tuesday announced that earnings from the iOS game Infinity Blade have exceeded $10 million in its first six months of release.

[ad#Google Adsense 300×250 in story]Epic vice president and co-founder Mark Rein said, “Infinity Blade’s success proves that triple-A gaming experiences can be hugely successful on iOS and that there is a valuable, pent up demand for premium content like this.” He added that Epic has licensed the game engine that powers Infinity Blade to “developers large and small…we’re looking forward to our licensees achieving spectacular results of their own.”

Infinity Blade is a fantasy-based swordfighting action game in which players hack and slash their way through opponents on their quest to reach the God-King. Players gain experience, build stats and acquire more powerful items. It’s priced at $5.99, and is available as a universal app that runs natively on iPhone/iPod touch and iPad.

Since its initial release, Chair has updated Infinity Blade with free content including two major enhancements that included an expansion of the single-player game and an add-on with multiplayer and “Survival” modes.

Infinity Blade was the first iOS game developed using Epic’s Unreal Development Kit (UDK), the same game technology that powers Unreal Engine 3. UE3 has been used to create hit games like the Gears of War series, Bulletstorm, Mass Effect, Bioshock 2 and many others.