The official rules options checklist for Old-School Essentials.
- Lists all optional rules.
- Includes checklists for the 2026 game and older versions of the game.
- Optional rules summaries for quick reference.
- Lists the origin of each optional rule, e.g. inspired by B/X, inspired by AD&D, etc.
- A check box for each optional rule.
- A4 size for home printing.
- Form-fillable PDF.
