Gameloft’s Hero of Sparta wowed early iPhone adopters upon its launch in 2008 with impressive 3D graphics and hack-and-slash action that rivaled Sony’s God of War series. This week, Gameloft launches Hero of Sparta II ($6.99), a sequel that introduces a new control scheme and iPhone 4-optimized graphics.

Gameloft notes that Hero of Sparta II features overhauled jumping controls, allowing for advanced platforming elements and new aerial combat maneuvers. The game’s fighting system has also been refined thanks to the addition of an “advanced action virtual pad.”

Hero of Sparta II features 12 levels of mythology-themed action. The game is playable on all iOS devices, though iPhone 4 and iPhone 3GS owners will enjoy enhanced graphics and improved gameplay performance.