Seems id has a sale going right now for Doom Resurrection and Wolfenstein 3D on the iPhone/iPod Touch. I’ve got them both so if you’re wondering whether or not to get em: do!
Wolfenstein 3D’s controls may be a little awkward at first, to those not already use to the touch controls, but at 99 cents it’s worth the mobile nostalgia…
Doom Resurrection is made for the iPhone and is quite good. I think I may have a post on here somewhere about it… anyway — it’s on rails, so no movement of the player. The only movements you have to make are aiming your weapon via tilting. It likely isn’t everyone’s cup of tea, but for the reduced price it is very worth it. I fully enjoyed it at the full price.