Working off the same engine as Yeti3D - iPac3D is a fun version of Pac Man which is a lot of fun.  Marco Giorgini writes:

It's basically a Pac Man clone - but you (as Pac Man) are a man in a 3D maze and instead of ghost there are 3D human enemies.
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It's a small game (not yet finished but fully playable) that makes you "Pac Man". You are in a labyrinth and you have to eat all the pills (actually all the "cubes" :-)...) in order to pass to next level. Easy? Not so much - considering that in that labyrinth there are wandering buddies that want to stop you. Their touch is hurting - and you have NOT weapon this time. In the labyrinth there are also special "cubes" that makes you a buddies killer - but just for a short while.

This game cannot be played unless you jailbreak your iPhone/iTouch.  You need to read how to do this first and be absolutely sure to backup the device first!