Editing Dungeons & Dragons Glossary (section)

=== S ===
; sandbox
: A campaign style where there is no overarching plot driving the players toward a scripted conclusion. See metaplot.

;secondary ability score : (4E) an ability score which provides secondary bonuses to a class's powers, often in "riders" (q.v.). 

; SRD
: '''System Reference Document''' - a compilation of Open Game Content (OGC) released under the Open Gaming Licence (OGL) by Wizards of the Coast (WotC). The original third edition SRD included material from ''Player's Handbook'', ''Dungeon Master's Guide'', and ''Monster Manual'', but later expansions added content from the ''Epic Level Handbook'', ''Deities & Demigods'', and ''Psionics Handbook''. While most of ''Unearthed Arcana'' was also declared OGC, none of the material was added to the SRD. A ''d20 Modern'' SRD was also released, with material from the core rules, ''Modern Arcana'', and the ''Menace Manual''. The fourth edition did not have an SRD, but the fifth edition does; it has been released both under the OGL and a Creative Commons license. Many third party vendors have also adopted the terminology, with Anime, ''Fudge'', and ''Traveller'' SRDs among many others.

; S&W
: '''''Swords & Wizardry''''' - a 0e retro-clone that comes in two versions. The ''Core Rules'' version replicates the ''3-Volume Set'' plus selected material from the Supplements, primarily ''Greyhawk''. Not a particularly faithful clone, because some elements were excluded (e.g. no thieves), there is support for both ascending and descending AC, and the five saves have become a single number. The ''White Box'' is the ''Core Rules'' minus all material not in the original ''3-Volume Set''.