This issue features a 15 page OSR style play book. These are more-or-less the rules I have adopted for my own game. They harken back to older versions of the game, such as B/X, riffing on Labyrinth Lord, The Black Hack, and Swords & Wizardry... but with some "modernisms" such as ascending armor class.
Oh, and new classes to boot. And tons of meatshield NPCs. Boom.