One of video gaming's earliest hits has returned as an iOS game. Sea Wolf, a 1976 arcade game by Midway, has been updated for release on the App Store by Coastal Amusements, based on its own arcade revival. In the transition, the graphics for the submarine combat simulator have been subject to obvious improvements, but the awesome periscope interface has been sacrificed to portability.
That said, the full game is only $1.99 (a lite version is also available), so if you want to go buy a toy periscope and figure out a way to attach it to your iPhone to play this, your investment is still going to be pretty low.