Apparently, Frank mentioned this game in the 1UP Retronauts podcast from this week, which is possibly why it popped up again, but Metafilter has an informative post on insane 3DO vapoware game Duelin' Firemen.

Here's the wisdom of the original MeFi post: "Duelin' Firemen was originally conceived as a 3DO game. According to this old subgenius post (Rev. Ivan Stang was apparently part of the cast), it was slated to be completed in July of 1995. It never saw the light of day. Fortunately (or unfortunately, depending on how you look at it), some of the game's video sequences survive, edited together in all their seizure-inducing glory [YouTube link]."

As the post ends: "Watch for cameos by Rudy Ray Moore, Mark Mothersbaugh, Tony Hawk, Timothy Leary, Steve Albini, David Yow, and a whole bunch of others... if you can actually bear to watch it."

There's also a very informative comment on the MeFi thread from 'eatyourlunch': "A few years ago, Grady [Sain, also one of the folks behind Urban Yeti alongside a slightly deranged old friend of GSW's] told me they'd hoped to revive the game, but then 9/11 happened. Planes+WTC and Space Shuttle+Sears Tower were too close for their comfort so, barring a rewrite and reshoot, this is all we're ever going to see of Duelin' Firemen."

He concludes: "But the spirit of runandgun is still alive and well with their alumnus Dave Foss (you certainly don't want to miss Horned Gramma or his alter-ego, TV Sheriff.) Other amazingly creative folks from the early 90s Chicago video scene include VJV2, Brian Dressel and Brien Rullman at OVT Visuals, and of course the inimitable H-Gun." All crazy, all the time.