Doom Resurrection has been released for the iPhone and is definately at the top-end price wise. It is selling for £5.99/$9.99, but early reviews have been very positive.

Immerse yourself in the first person experience that takes your iPhone or iPod Touch beyond previously imagined limits. Introducing DOOM Resurrection, a brand new, technologically advanced, heart-pounding chapter in the legendary DOOM Saga!

Scientists on a remote research facility on Mars have lost control of their experiment and all Hell has broken loose. As the last surviving marine, you must defeat the intruders and help the remaining scientists unravel the mystery of what happened and more importantly, figure out how to stop it. You must succeed! The future of Earth depends on it!