Old-School Essentials vs Shadowdark RPG
Compare Old-School Essentials and Shadowdark RPG side by side. See differences in complexity, dice, genre, cost, and more.
| Old-School Essentials | Shadowdark RPG | |
|---|---|---|
| Genre | Fantasy | Fantasy |
| Play Style | Dungeon Crawl, Deadly, Sandbox, Low-Prep, Beginner-Friendly, Gritty, Ascending AC, Descending AC, Vancian Casting | Deadly, Dungeon Crawl, Rules-Light, Low-Prep, Theater of the Mind, Ascending AC, Roll to Cast, Random Tables |
| Core Mechanic | Roll d20 vs. descending AC via attack matrix (THAC0). Five-category saving throws. Side-based d6 initiative each round. | Roll d20 + ability modifier vs. DC/AC. Real-time torch tracking (1 real-world hour per torch), risky spellcasting (fail a check and lose the spell until you rest), and randomized character generation (3d6 down the line). |
| Dice | d20 | d20 |
| Complexity | Low | Low |
| Accessibility | Very High | High |
| Runnability | Very High | Very High |
| License | OGL 1.0a | Shadowdark RPG Third-Party License |
| Cost | $$ | $$ |
| Publisher | Necrotic Gnome | The Arcane Library |
| Year | 2019 | 2023 |
| Best For | Groups wanting a clean, beautifully organized take on classic B/X D&D with decades of compatible old-school content. | Tense, fast-paced dungeon crawling where resource management and player ingenuity matter more than character builds. Ideal for groups wanting old-school lethality with a modern, 5e-familiar ruleset. |
| Highlights | Clear layout and organization, wide B/X and OSR compatibility, modular supplements, highly hackable | Light burns in real time (one torch lasts one real-world hour), turning the dungeon into a ticking clock that pressures every decision. Built-in random tables for dungeons, NPCs, and treasure let the GM generate content at the table with almost no prep. Casting requires a spellcasting check, and failure ends the spell and locks it until you rest, making every spell a gamble rather than a guaranteed resource. |
| Considerations | No domain play or mass combat in core rules, treasure-as-XP requires careful GM economy management, limited character options in Classic edition without Advanced supplements | Character creation offers limited customization: ancestry, class, and rolled stats, with little room for build optimization. Talents are gained by random roll at level up, so advancement is partly out of the player's control. Real-time light tracking only works if someone reliably tracks elapsed time, which can be disruptive or forgotten at the table. |