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docs/puzzles/observation-replay.md

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+# Observation Replay
+
+**Information Architecture**: Game presents a procedural sequence once, under observation-only conditions (guard present, locked door, NPC interference). Player cannot interact during the demonstration.
+
+**Player Action Pattern**: Watch and memorize the exact sequence of actions or values. Return when guard/interference is absent. Replay sequence precisely to unlock new access.
+
+**Core Mechanic**: Single viewing + exact reproduction = reward. Information is presented in correct order once; puzzle difficulty emerges from memory load plus opportunity management.
+
+**Variations**:
+- Numeric sequences (safe combinations, door codes)
+- Action sequences (push/pull patterns, dance moves)
+- Visual patterns (light arrangements, color orders)
+
+**Adventure Game Implementation**:
+- NPC performs action while blocking player interaction
+- Cutscene triggers once, cannot be rewound
+- Player must note sequence through observation alone
+- Return later when conditions allow replication
+- Standard actions (USE TALK LOOK) applied in memorized order
+
+**Example Structure**:
+
+```
+Player needs: Access to [LOCKED_LOCATION]
+
+Discovery Phase:
+→ Approach [LOC] and observe [NPC] perform exact sequence:
+  "Watch as guard opens safe: PULL-15, PUSH-3, PULL-27"
+→ Blocked from interacting ("Can't touch while watched!")
+
+Return Phase:
+→ Create opportunity (distract NPC, wait for departure)
+→ Apply memorized sequence to [OBJECT] with same standard actions:
+  USE safe → PULL handle 15 times...
+→ Reward unlocked
+```
+
+**King's Quest VI Parallel**: None identified in walkthrough.
+
+**Monkey Island Examples**:
+- **Safe Combination**: Storekeeper opens safe while player watches (notes combination). Later, when storekeeper leaves shop unsupervised after going to find Sword Master, player returns and enters exact PULL/PUSH sequence he observed.
+
+---
+
+## Related Types
+
+- **Multi-Faceted Plan**: Requires synthesis of multiple requirements discovered at different times
+- **Timed Consequence**: Both involve missing opportunities, but OR is about *memory* + *timing* while TC is about narrative urgency
+- **Information Brokerage**: Both involve NPCs as information sources, but OR focuses on *action sequences* not exchange networks