On — Ivory from the East

Mission: 17 of 38 — choice B of the Iunet / On pair
Era: Old Kingdom · Dynasty 4 · Pharaoh Khufu
Classical name: Heliopolis (Iunu) — the mission briefing popup uses "Heliopolis"
Starting funds: Very Easy 12 000 Db Easy 8 000 Db Normal 6 000 Db (pak) Hard 4 000 Db Very Hard 3 200 Db
Debt interest: Normal 20% (pak) Hard 25% Very Hard 30%
Deities: Osiris · Ra · Bast (pak)
Trade: Iunet (sea 1500) · Saqqara (sea 400) · Dahshur (sea 200) · Meidum (sea 450) — closed; Men-nefer display
Previous mission: North Dahshur
Next mission: Rostja (18) — the Iunet / On paths converge there
Status: Choice B Implemented

Briefing

The mission opens with the history panel (message_history_on) and the briefing popup (message_mission_heliopolis):

Pharaoh Khufu has taken the throne, and our people have already begun to suffer under his oppression. It is rumored he plans a colossal building project on the plateau outside Rostja, to usurp the renown his father Snofru earned from his two noble pyramids.

Khufu has ordered a cluster of quarries dug at Tura, where rich deposits of fine white limestone have been discovered. You must also build three mastaba tombs for the nobles of this region. The quarrying settlement you found shall be named "On", and shall serve as a plentiful source of limestone for many years.

The finest ivory may be obtained via Byblos, trading with Assyria and Ur. With the arrival of such rare luxury goods, On is sure to prosper.

On is the ancient Egyptian name for Heliopolis (Iunu). In the campaign it is the peaceful, high-culture arm of the Khufu fork: a limestone-quarrying town that builds three noble mastabas. Pak has no timed enemy raids — only a favour Pharaoh chain if kingdom rating collapses. Luxury goods come via Saqqara (Byblos is display-only foreign on this empire map).

Objectives

Goals match mission1.pak scenario 17.

Population4 000 citizens
Culture rating40
Prosperity rating35
Monument rating18 — three small mastabas
Kingdom rating60
Housing level10

Matches the original: monument goal 18 — three small mastabas under the additive rating formula (2.25·Σ+4.5, weight 2 each → 2.25·6+4.5 = 18, in city/monuments.js). After construction, dispatch burial provisions via the Overseer of Monuments: linen / luxury goods / timber ×8 and limestone / granite ×32 (from JS burial_provisions; win waits until these are sent). When a mastaba is finished and those provisions are complete, a one-shot funeral walker procession walks to that tomb.

Scripted events

Full empire redefine verified against pak scenario 17 (2026-07-26). Empire id 1. Scenario enemy Hittite (no timed raids). Favour Pharaoh 20×5.

Year 3 · month 2Limestone demand +6 at Dahshur.

Year 3 · month 5+Limestone ×25 / 36 months recurring (ok KR+26; refuse −18 → LOST_TRADE Kyrene; late −9).

Year 4 · month 7+Perfect flood (annual) → chain game meat ×9 / 9 months (ok KR+7; refuse −25; late −3).

Year 7 · month 9Clay pit flood (8% of pits).

Year 8Limestone demand +9 at Iunet.

Year 9Wage increase +7.

Favour collapsePharaoh army 20 → 20 → 20 → 20 → 20.

Strategy

On trades military pressure for economic and cultural demands: culture 40, three mastabas, and a limestone-export economy. Keep kingdom rating above zero — favour is five waves of size 20.

Phase 1 — Limestone and food

Limestone Quarries supply mastabas, the recurring Pharaoh ask, and exports. Open Dahshur early (cheap, sea 200) for straw/beer; Saqqara for luxury goods.

Phase 2 — Three mastabas

Small mastabas need bricks — Clay Pits, Bricks Workshop, straw. Work Camps and guilds keep construction moving. Hunting Lodge for the perfect-flood game-meat chain.

Phase 3 — Culture 40 and prosperity 35

Scribal Schools, Libraries, temples (Osiris / Ra / Bast), full entertainment including Senet Houses. Import luxury via Saqqara.

Tips

No timed invasions — forts are optional insurance against favour collapse.
Size limestone production above the ×25 / 36mo ask plus exports.
Bast temples raise culture in a peaceful showcase city.

Available buildings

All buildings are available from mission start. Religion: Osiris, Ra, Bast (no Ptah/Seth).

Category	Buildings
Housing & roads	Vacant Lot · Clear Land · Road · Road Block · Low Bridge · Ferry
Municipal	Firehouse · Architect's Post · Police Station · Village Palace · Personal Mansion · Tax Collector · Courthouse
Health	Water Supply · Apothecary · Physician · Mortuary
Food & farming	Grain / Barley / Figs / Flax Farm · Cattle Ranch · Reed Gatherer · Hunting Lodge · Water Lift · Irrigation Ditch · Bazaar · Granary · Storage Yard
Raw materials	Limestone Quarry · Sandstone Quarry · Stone Quarry · Clay Pit
Industry	Bricks · Pottery · Brewery · Papyrus · Weaver · Jewels Workshops · Work Camp
Monuments	Small Mastaba · Medium Mastaba
Guilds	Stonemasons' · Carpenters' · Bricklayers'
Military	Recruiter · Weaponsmith · Military Academy · Infantry / Archers / Charioteers Fort
Religion	Temples & Shrines of Osiris, Ra, Bast · Festival Square
Education / Entertainment	Scribal School · Library · Booth · Juggler School · Bandstand · Conservatory · Pavilion · Dance School · Senet House
Beautification	Small / Medium / Large Statue · Gardens · Plaza

Developer reference

All paths are relative to the repository root.

Mission script — src/scripts/mission/m_017_on.js

Imported by src/scripts/missions.js. Key config:

mission17 {
  start_message : "message_mission_heliopolis"
  player_rank : 6
  next_mission : 18
  // funds Normal 6000 / loan 3000 / debt 20%
  // pop 4000, culture 40, prosperity 35, monuments 18, kingdom 60, housing 10
}

Empire id 1 via empire.set_id(1). Enemy ENEMY_4_HITTITE (scenario id only — no timed raids).

Event handlers — m_017_on.js

event_mission_startempire.set_id(1); wire limestone / gamemeat leaves.mission17_on_start
Requests / floodslimestone×25 y3m5+; perfect flood→gamemeat×9; clay 8% y7m9.mission17_event_i5 / i1 / i2
Demand / wage / favourdemand +6/+9; wage +7; favour 20×5.mission17_event_i0/i3/i4 / favour

Game messages & known deviations

Key	ID	When shown
`message_history_on`	217	History briefing ("Ivory from the East")
`message_mission_heliopolis`	417	`start_message` popup (classical name)

MESSAGE i=6 (orphan chain_only acknowledgement) skipped.
Men-nefer route 7 — no pak polyline; 2-pt stub + deviation.
Empty map_obj idx=9 skipped.
Briefing Byblos ivory — Byblos is non-trade foreign on this map; luxury via Saqqara.
Favour JS-proxied until B2-migrate (five waves; helper only supports two).
LOST_TRADE Kyrene on limestone refuse — Kyrene is already non-trading foreign (pak as-is).

16 · Iunet — The Defense of Egypt 18 · Rostja — The Great Pyramid and Sphinx