Dslyecxi has also created the mammoth Shack Tactical 'Armed Assault: Combat Operations' Tactics, Techniques, and Procedures Guide. It has been available since mid-2007, but it is worth highlighting here as a particularly impressive and dedicated piece of work. It has a focus on ArmA, even suggesting particular mods for that game, but most of its material can be applied to these kinds of tactical games in general.
The guide has gotten high praise from Bohemia itself. "This guide also does great job in staying in the boundaries of tactical computer gaming and does not try just to repeat excerpts of real world field manuals which are not always so valuable in the realm of tactical gaming," said CEO Marek Spanel. "It is definitelly the most comprehensive overview of various aspects of the simulation provided in ArmA published to date."
The whole thing is available for free online at the above address but, even more impressively, it can also be purchased in a print version designed by ShackTac member mofo8.