Old-School Essentials
TABLETOP RPG (2019) by NECROTIC GNOME + designer GAVIN NORMAN — the FLAGSHIP 'OSR' (OLD-SCHOOL RENAISSANCE) SYSTEM. Re-organized clone of BASIC/EXPERT D&D (B/X, 1981 Moldvay/Cook). Signature: STRIPPED-DOWN + ELEGANT rules; deadly early character levels ('MEAT-GRINDER'); RESOURCE MANAGEMENT of torches, rations, encumbrance; SANDBOX-EXPLORATION over pre-scripted quests; PLAY IT OLD SCHOOL — description over dice-rolling; PROCEDURAL DUNGEONS + wilderness. Beautiful HIGH-CONTRAST BLACK+WHITE ART. Popular Advanced Fantasy variant; huge OSR module ecosystem (Dolmenwood, Winter's Daughter).
Quick facts
Category
Tabletop Role-Playing
Type
Team sport
Players
3–8
Duration
~240 min
Where played
indoor
Country of origin
🇬🇧 United Kingdom
Estimated origin
2019 by Necrotic Gnome (Gavin Norman); rules clone of D&D Basic/Expert 1981 Moldvay/Cook
Olympic
No
Popularity
regional
How it works
Objective
Adventure through dungeons + wilderness; survive + accumulate treasure + LEVEL UP (XP mainly from gold + treasure, secondarily from combat).
Rules
Basic rules
6 CLASSES (Cleric, Dwarf, Elf, Fighter, Halfling, Magic-User, Thief) + more in Advanced Fantasy variant
Signature 6 core B/X classes.
ABILITY SCORES: STR/DEX/CON/INT/WIS/CHA (3-18 range, 3d6 rolled in order)
Signature ability scores.
d20 attack rolls vs ASCENDING AC or DESCENDING AC (referee choice)
Signature d20 combat.
SAVING THROWS: 5 categories (Death, Wands, Paralysis, Breath, Spells)
Signature 5 saves.
XP: 1 XP per 1 GP treasure recovered + XP for defeated monsters (treasure-focused)
Signature gold=XP.
MAX LEVEL 14 in base; character level = 'Name Level' with strongholds
Signature 14-level cap.
PROCEDURES: dungeon exploration (torches, encounters), wilderness travel (hex-crawl, rations)
Signature procedural play.
MORALE checks for monsters — they don't fight to death; often flee at half HP
Signature morale system.
Scoring
Character advancement via XP (treasure + monsters); campaigns judged by memorable stories + survival.
Win condition · Character survival + gold accumulation + level advancement; long-term goal often strongholds.
Equipment
OSE Rules Tome (or Player + Referee's Tome pair)
Signature rulebook
Polyhedral dice set (d4, d6, d8, d10, d12, d20, d100)
Signature dice
Character sheets
Signature character sheets
Miniatures + grid map (optional; theatre-of-the-mind common)
Optional minis/grid
OSR modules (Dolmenwood, Winter's Daughter, The Isle)
Popular adventure modules
Terminology
- OSR
- Old-School Renaissance — retro RPG movement.
- B/X
- Basic/Expert D&D (1981 Moldvay/Cook rules) — OSE's basis.
- Meat-grinder
- Style of deadly play where PCs die often (esp. levels 1-3).
- Hex-crawl
- Wilderness exploration procedure using hex maps.
- Descending AC
- Classic AC system: lower AC = better (AC 9 unarmored, AC 2 plate).
- Name Level
- Level at which class builds strongholds (e.g. Fighter 9).
- Dolmenwood
- Popular fairy-tale medieval OSE campaign setting by Necrotic Gnome.
Where it is played
Sources & provenance
- Necrotic Gnome — Old-School Essentials— Necrotic Gnome
- Wikipedia — OSR— Wikipedia