A retro clone game based on just the original 3 book Dungeons and Dragons box set from 1974. The Whitebox version of S&W differs from the regular version in that it ignores any of the later supplements, resulting in an even lighter ruleset than regular S&W!
From the publisher's site
"Light your torches, don your helmets, and ready your spells... the Swords & Wizardry Whitebox Rules are a "clone" of the original Gary Gygax 1974 fantasy roleplaying game that started it all. Based on the Swords & Wizardry Core Rules, the Whitebox Version takes you ever further back, because it uses ONLY the first three books of the original game, with no material from the supplements at all."