The first salvos in Bungie's anniversary news assault have been fired, and one round has a decidedly Pfhorlike flavor.

Bungie is announcing that Daniel Blezek has ported Marathon 1 to iOS; efforts started in 2010 and apparently the app is ready now-- I don't see it in the iOS App Store just yet, but I'm going to keep looking.

UPDATE: MacRumors, MacCentral and TouchArcade (earlier this year) also have stories on Marathon coming to the iPad, as well as screenshots and more details. Unlike the XBLA port of Marathon 2 made previously, the iPad version of Marathon apparently is based on the code open sourced and developed by the community as the Aleph One project, and reportedly will be a free release.