From the Back Cover:
A Free Collection of Roleplaying Games based on the one page old school RPG Searchers of the Unknown including the original, expansions, and variants.
The Searchers of the Unknown RPG Collection is a compilation of Searchers of the Unknown based games. This collection is made available for free and is not to be sold. Each individual game is a separate entity. is copyrighted separately (if at all), and is available for free. The author of each individual game is solely responsible for his or his work. No editing of individual games has been done.
From the Introduction:
Searchers of the Unknown is a one-page roleplaying game where player characters are entirely defined by a minimalist old school Dungeons & Dragons one line tat block (e.g. "AC 7, MV 9, HD 2, hp 9, #AT 1, D 1d8 mace") something like monster stat blocks in early editions of D&D. All actions are based on those stats. Armor class is the old school "lower is better," but the way armor class is used in SotU it makes sense with armor class generally helping against attacks but hindering initiative and attempts to be stealthy. The basic SotU generally uses a level plus AC roll under mechanic, using an opponent's AC when attacking or the character's own AC when trying to be stealthy. Saves require a roll under level plus 4. Variants versions of SotU use D20 or Target20 rolls. In the basic game, all characters are human adventurers. Supplements add demi-humans and spell-casting classes.
Like Microlite20, the original Searchers of the Unknown rules inspired a large number of similar games based on the same principles, ranging from simple variants like INVALID OBJECT ID=, type=family to modern day games, science fiction games, after the holocaust games, etc. Most of these games are complete in one or two pages. A few have additional supplements of their own.
Unfortunately, there is no central web site for Searchers of the Unknown and links to the various versions one finds on the web are often broken. This Searchers of the Unknown RPG Collection was created to make it easier to obtain these excellent little RPGs.