Great Old School FPS post

Metafilter had a great post about old school FPS gaming (Doom, Duke3d, etc)  Check it out  http://fullglassemptyclip.com/2010/06/22/doom-duke3d-and-more-a-guide-to-early-fps-and-source-ports/ 
 
Original metafilter post -  http://www.metafilter.com/93169/A-Guide-To-Some-Early-FPS-Games-Mods-and-Source-Ports 
 
Enjoy!