From publisher blurb:
Have you ever wondered what it would be like to have your players dabbling in low anachronous-tech science fantasy, with anti-heroic gunslinger characters in the vein of Roland of Gilead, Solomon Kane, Lord John Roxton, Jack Sparrow, or even Don Kaye’s Merlin-D? What do you think would have happened if Gary Gygax, in creating his fantastical medieval history RPG, had never arbitrarily erased gunpowder from the heroic fantasy lexicon? And in what possible world, pray tell, do the legendary Cloud City of Laputa, the ever-fabled City of Brass, Jack the Giant Killer, imp-loaded hand cannons, Doctor Mirabilis, the King in Yellow, and Great Cthulhu coexist with one another?
If you’ve never thought of these questions, let alone their potential answers, that is because you are sane. Fortunately, in the realms of Oldskull we long ago dispensed with sanity as a petty and needless obstacle, barring the way to endlessly strange and fun ideas.
Herein you will find the Fusilier, an optional Player Character (or NPC) fighter sub-class, inspired in part by Arneson, Gygax and Perren, Howard, King, Poe, Browning, Hodgson, and Jonathan Swift. Secrets revealed in this tome include the following: Oldskull lore, binding old school fantasy firearms and asynchronous tech lore cohesively together; a Gygaxian history of guns in 1970s play; rules for introducing the wondrous Cloud City and its like; alchemical pulver (arcane gunpowder from out of another reality); medieval handgonnes; misfires; trick shots; kill shots; brimstone Glamours; and more. If you’ve ever looked for a way to introduce guns to the classic fantasy RPG in a limited fashion without ruining the lore of your campaign, you will find this supplement to your liking. Particularly if you’ve been drinking.
This book has been written to interface directly with the Old School Essentials game, as derived from compatible systems under the rules originally published by Gygax (1974-1985), Holmes (1978), Moldvay (1981), Mentzer (1983-1986), and many others. Even if it’s just a one-shot, why not give your players a game experience they will never forget?