Dungeons & Dragons vs Old-School Essentials
Compare Dungeons & Dragons and Old-School Essentials side by side. See differences in complexity, dice, genre, cost, and more.
| Dungeons & Dragons | Old-School Essentials | |
|---|---|---|
| Genre | Fantasy | Fantasy |
| Tags | Tactical, Heroic, Character Building, High-Fantasy, Classic Fantasy, Vancian Casting, Ascending AC | Dungeon Crawl, Deadly, Sandbox, Low-Prep, Beginner-Friendly, Gritty, Ascending AC, Descending AC, Vancian Casting |
| Core Mechanic | Make a D20 Test by rolling d20, adding relevant modifiers, and comparing the total to a target number. Ability checks, saving throws, and attack rolls use this procedure. Advantage and disadvantage use two d20s and keep the higher or lower result. | Roll d20 vs. descending AC via attack matrix (THAC0). Five-category saving throws. Side-based d6 initiative each round. |
| Dice | d20 | d20 |
| Complexity | Medium | Low |
| Accessibility | Very High | Very High |
| Runnability | Very High | Very High |
| License | CC BY 4.0 (SRD); core books proprietary | OGL 1.0a |
| Third-Party Publishing | Commercial publishing allowed — Open license | Not yet researched |
| Summary only, not legal advice. Check current terms before publishing. | ||
| Cost | Free | Free |
| Publisher | Wizards of the Coast | Necrotic Gnome |
| Year | 2024 | 2019 |
| Best For | Groups who want heroic fantasy with configurable tactical combat, broad character options, and campaigns that span multiple levels. | Groups wanting a clean, beautifully organized take on classic B/X D&D with decades of compatible old-school content. |
| Highlights | Advantage and disadvantage resolve common situational effects by selecting the higher or lower of two d20 rolls. Backgrounds, classes, subclasses, and feats distribute character choices across creation and advancement. Weapon Mastery gives qualifying weapon users distinct tactical effects without replacing the action economy. | Clear layout and organization, wide B/X and OSR compatibility, modular supplements, highly hackable |
| Considerations | Spell preparation, spell slots, class features, and conditions create several interacting resources for players to track. High-level characters combine many spells and features, increasing adjudication work for the DM. Bastions add a separate downtime procedure for campaigns that use the stronghold rules. | There is no domain play or mass combat in the core rules. Treasure-as-XP requires careful GM economy management. Character options are limited in the Classic edition without the Advanced supplements. |