Crazy Hedgy (You probably know this game already). This is in my opinion the best 3D platformer in the App Store so far.
the only problem with Crazy Hedgy is no virtual-d pad control. sometimes I rather like play it in the bed.
Toyshop adventures, paper monsters,Rayman: the great escape, world of magic .. These are mostly 2.5d but that's the best your going to get in my opinion, I don't like 3d explorer games on iOS.. It just doesn't feel right and the controls always feel odd to me.. Almost feel disorientated.
I didn't enjoy crazy hedgy.. But I picked it up at 1.0.. Maybe some updates improved it. I don't like tilt only controls. If I was going to play a tilt game, it'd be "katamari".
Crazy Hedgy is one of the only tilt platformers that actually works. Others are Rolando, Square Planet and Tero
I found this and it's craziest thing on App Store https://itunes.apple.com/gb/app/outfoxed/id500141426?mt=8 YouTube: video