Legacy of Yu

Readiness

draft-ready (confidence=0.67, rules=0.65, fun=0.70). BGG rank: 392; year: 2023; weight: 2.91; playtime: 60 min

Core Loop

Legacy of Yu is a solo-only campaign game by Shem Phillips set in ancient China — you are Yu the Great, working to tame floods and build a civilization across a series of linked scenarios. Each session, you place workers on action spaces to gather resources (wood, stone, food, etc.), recruit helpers, build sections of canal/wall, and deal with barbarian raids. The flood track ticks up turn by turn; barbarian raids attack at scripted moments. The campaign branches based on whether you win or lose each scenario — the game updates with stickers, new cards, and new rules between sessions.

Turn Structure and State

• No manual/BGA/transcript source is present; card relies on memory plus BGG context.
• BGG description anchor: During the reign of Emperor Yao, the people of ancient China were constantly plagued by deadly floods along the Yellow River. Eager to put an end to the devastation, Yao selected Gun, one of his officials, to devise a plan. After nine years of failed attempts using dams and dikes, Gun's employment came to a questionable end. After his passing, Yu inherited his father's work. Learning from Gun's failures, Yu set [...]

Win Condition and Arc

Win a scenario by completing the build objectives (canals/walls finished) before the flood overwhelms you or barbarians sack your settlement. Whether you win or lose, the campaign continues — losses unlock different content than wins, so the branching tree is real and shapes which mechanisms enter the box. The campaign ends after ~15 scenarios when one of several finale paths triggers.

Decision Primitives

BGG mechanisms: Chaining, Hand Management, Multi-Use Cards, Scenario / Mission / Campaign Game, Solo / Solitaire Game, Sudden Death Ending, Worker Placement

Memory-derived primitives:

• Solo-only worker placement
• Resource conversion (wood/stone/food into builds)
• Push-your-luck on flood/barbarian timing
• Legacy progression: stickers on board, new card decks, branching scenarios on win vs. loss
• Card-driven action upgrades
• Reset between sessions (most state resets; only legacy elements persist)

v4 controlled primitives: worker_recall_phase, escalating_threat, network_building, feeding_pressure, arc_three_acts

Top iOS archetype fits: balatro 5.5, coop 5.5, cozy 4.7.

Why It Is Fun

The race-against-disaster pressure is constant: every turn you weigh "do I shore up against the next flood or push my economy?" Loss-branches feel narratively meaningful because losing isn't game-over — it's a different chapter. Solo design is tight (no AI opponent to fake), and the legacy reveals fold new mechanisms in cleanly.

Friction and Failure Modes

• Treat Sonnet-memory edge rules as draft until confirmed by manual, BGA, or transcript.
• Needs at least one stronger rules authority before final extraction use.

Translation and Design Hooks

• Use this card to ask: which primitive carries the fun if theme/licensing is removed?
• For iOS, look for short-session compression, clear state visualization, and a digital-only twist.
• For new tabletop design, look for the tension source and decide whether to preserve or invert it.

Edge Rules and Gotchas

• Flood track and barbarian invasion are separate timers — both are advancing, sometimes triggered by your own actions (drawing certain cards/events).
• Workers are placed and recovered on a personal turn structure rather than a clean round/reset.
• Sealed envelopes/decks unlock on specific triggers (X happens for first time, or at scenario start N).
• Defeat handling: instead of replaying, you proceed to the loss branch with permanent additions to the box.
• Reset rule: most components return to start state between scenarios — only legacy stickers and unlocked decks carry over.
• Variable setup per scenario via a setup booklet that references the current campaign state.

Sources Used

[
  {
    "kind": "llm_memory",
    "path": "data/llm_memory_sonnet/354934.md",
    "quality": 0.65,
    "note": "sonnet-self-rated-8"
  },
  {
    "kind": "tabletopia_overview",
    "path": "data/tabletopia_overviews/354934.md",
    "quality": 0.3,
    "note": "Tabletopia overview; not a rules authority"
  }
]