Why This Book Exists

This corpus presents a specific way of playing AD&D (1st Edition).

It is not a replacement for the Player’s Handbook, and it is not a complete redesign of the system. The underlying rules remain in place. What changes is how those rules are interpreted, applied, and constrained.

The PHB Overlay in this book shows those differences directly. Some rules are used as written. Some are adjusted. Some are not used at all. These changes are not isolated house rules. They follow a consistent model of play, expressed through the guiding principles.

That model favors earned capability over automatic progression, authority over entitlement, and in-world context over mechanical permission. The result is a style of play where character identity develops through action and position, not through selection of options.

This approach reflects a particular view of how the game is most coherent and engaging to run and to play. It is presented here as a complete and consistent model, rather than a collection of individual modifications.

The Role of the Commentaries

The "Commentaries" section in this corpus are not rules.

They do not define what a character can do, how outcomes are resolved, or how the system operates in mechanical terms. Those functions belong to the rules and to the PHB Overlay.

Instead, commentaries explain how the game behaves.

Where the rules define structure, commentaries provide context. Where the rules specify what is possible, commentaries describe what is typical, what is expected, and what carries consequence.

The two are intended to be read together, but they serve different functions. Commentaries should not be read as an extension of the rules, and the rules should not be expected to carry the explanatory weight of commentaries.

What Commentaries Do

The purpose of commentaries are to describe how the principles of Oath-Bound are expressed in play.

It addresses questions such as:

  • What does this feel like at the table?

  • How do characters tend to act within this model?

  • What patterns emerge over time?

These are not questions that can be answered through rules alone.

Commentaries also make visible where this model differs from common expectations of the Player’s Handbook, and what those differences imply in practice.

Where the PHB Overlay defines what changes, commentary explains how those changes work together.

How to Read Commentaries

Commentaries are best read as observation rather than instruction.

They do not tell the reader what must be done. They describe what tends to happen when the system is engaged as intended.

In some cases, they may describe behavior that differs from familiar patterns in other versions of the game. This is deliberate. The purpose is not to correct those patterns directly, but to make clear what replaces them.

Commentaries are not exhaustive, and are not authoritative in the same way as the rules. They provide a framework for understanding, not a complete account of every situation. Readers should expect to interpret and apply what they find here in the context of actual play.

Different tables may emphasize different aspects of the system. Commentaries exist to support that process, not to constrain it.

Why It Matters

It is possible to play using only the rules.

However, without the context provided by commentaries, the game will tend to be interpreted through more familiar assumptions. This can lead to patterns of play that are technically correct, but misaligned with the underlying model.

Commentaries reduce that gap.

Tone and Scope

Commentaries reflect a particular view of how the game is intended to be experienced.

They do not attempt to persuade by argument or to replace other approaches. They exist to make that view visible, so that players and referees can recognize the shape of the system they are engaging with.

They are best read as a guide to how to think about the system, not as an additional layer of rules.