Old-School Essentials vs Pathfinder
Compare Old-School Essentials and Pathfinder side by side. See differences in complexity, dice, genre, cost, and more.
| Old-School Essentials | Pathfinder | |
|---|---|---|
| Genre | Fantasy | Fantasy |
| Tags | Dungeon Crawl, Deadly, Sandbox, Low-Prep, Beginner-Friendly, Gritty, Ascending AC, Descending AC, Vancian Casting | Tactical, Crunchy, Character Building, High-Fantasy, Dungeon Crawl, Lore-Heavy |
| Core Mechanic | Roll d20 vs. descending AC via attack matrix (THAC0). Five-category saving throws. Side-based d6 initiative each round. | Roll d20 + modifier against a DC. Four degrees of success: critical success (beat DC by 10+), success, failure, and critical failure (miss by 10+). Each turn grants three actions to spend freely on strikes, movement, spellcasting, or other activities. Multi-attack penalty (-5/-10) discourages repeated strikes and encourages tactical variety. |
| Dice | d20 | d20 |
| Complexity | Low | High |
| Accessibility | Very High | Very High |
| Runnability | Very High | Very High |
| License | OGL 1.0a | ORC |
| Third-Party Publishing | Not yet researched | Commercial publishing allowed — Open and compatibility licenses |
| Summary only, not legal advice. Check current terms before publishing. | ||
| Cost | Free | Free |
| Publisher | Necrotic Gnome | Paizo |
| 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. | Groups who want deep character customization, tactical grid combat with meaningful turn-by-turn decisions, and a richly detailed fantasy setting with free rules. |
| Highlights | Clear layout and organization, wide B/X and OSR compatibility, modular supplements, highly hackable | The three-action economy gives every turn the same three actions to spend on strikes, movement, or spells, so each turn is a fresh tactical decision. Characters customize through ancestry, class, skill, and general feats gained at nearly every level, letting builds diverge sharply within a single class. Four degrees of success, set by beating or missing the DC by 10, turn each roll into a range of outcomes rather than a binary result. |
| Considerations | 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. | New players must learn the trait system, conditions, and four degrees of success before combat runs smoothly. Multi-attack penalty and numerous combat actions can slow turns for indecisive players. Character creation draws feats from ancestry, class, skill, and general pools at every level, making each build a slow step. |