The creators of Metropolitan Mayhem, an urban-themed level pack for Duke Nukem 3D, uploaded a brand-spanking new trailer for their mod, which came out in... March 2012. Odd timing. Still, there's "an hour's worth of oldskool entertainment" to be had, so if you've got Duke 3D and like the way this looks, dig in!
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Man Duke Nukem 3D.
Between that and Quake 2, my online fps madness started.
COD killed said Madness, but those were the days.