Mobile game developer Gameloft has announced that they will be developing more than 15 game titles for the iPhone in 2008.
Gameloft is already responsible for a few Apple iPod games such as Block Breaker Deluxe and Brain Challenge. Wikipedia lists a number of games developed by Gameloft, including mobile versions of Prince of Persia, Rayman, Might and Magic and Tom Clancy's Rainbow Six.
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In the days leading up to the iPhone SDK announcement, Gameloft's keynote speech showed off this mockup of an upcoming iPhone game.