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This article is about the technology in Age of Empires II. For other uses, see Boiling Oil.

Boiling Oil was a technology in Age of Empires II HD: The Forgotten that was unique to the Persians and could be researched at the Castle. Once researched, it gave Castles +9 attack against rams (effectively resulting in 6-8 additional damage, depending on the type of ram). It only affected the first arrow; all additional ones still dealt only the minimum damage of 1.

In the Definitive Edition, this technology was replaced by Kamandaran, which changed the cost of the Archer line from 25 wood, 45 gold to 50 wood (60 since update 34699).

Strategy[]

As buildings, Castles are weak against siege units like rams, which have an immense attack bonus against them. Boiling Oil enables Persian Castles to defend slightly better against them, though any more than one Ram still requires the attention of melee units. Bombard Cannons and Trebuchets of course still outrange Castles and remain a heavy threat, but unpacked Trebuchets do get the bonus damage from Boiling Oil. University upgrades should be researched to increase the efficiency, especially Murder Holes since without it, as soon as the rams get beneath the Castle, Boiling Oil becomes useless. Blacksmith upgrades also add range to the Castle and should be researched, as they increase the time to apply the extra damage.

Changelog[]

AoEIIDE icon Definitive Edition[]

  • Boiling Oil is removed from the game.

Trivia[]

  • Before its removal and replacement in the Definitive Edition, Boiling Oil was considered one of the weakest unique technologies (along with Atheism), and almost never saw any use in multiplayer matches, and with no known instances of being researched in the competitive scene.
  • It cannot be said that the employ of boiling oil in siege warfare was invented by the Persians, or that it was even especially adopted by them. Its first recorded use was 67 AD in Yodfat (or Jotapata, located in northern Israel) against Vespasian's legions. Beyond that, the lack of evidence shows that the use of boiling oil for defense was rarely seen through history; in the Middle Ages, use of boiling water and hot sand were considerably more common defense techniques.[1]

References[]

Unique technologies in Age of Empires II
AoE2-DLCicon-0 The Age of Kings civilizations
UniqueTechCastle-DECivIcon-Britons Yeomen · CivIcon-Byzantines Greek Fire · CivIcon-Celts Stronghold · CivIcon-Chinese Great Wall · CivIcon-Franks Bearded Axe · CivIcon-Goths Anarchy · CivIcon-Japanese Yasama · CivIcon-Mongols Nomads · CivIcon-Persians Kamandaran · CivIcon-Saracens Bimaristan · CivIcon-Teutons Ironclad · CivIcon-Turks Sipahi · CivIcon-Vikings Chieftains
UniqueTechImperialDECivIcon-Britons Warwolf · CivIcon-Byzantines Logistica · CivIcon-Celts Furor Celtica · CivIcon-Chinese Rocketry · CivIcon-Franks Chivalry · CivIcon-Goths Perfusion · CivIcon-Japanese Kataparuto · CivIcon-Mongols Drill · CivIcon-Persians Citadels · CivIcon-Saracens Counterweights · CivIcon-Teutons Crenellations · CivIcon-Turks Artillery · CivIcon-Vikings Bogsveigar
AoE2-DLCicon-1 The Conquerors civilizations
UniqueTechCastle-DECivIcon-Aztecs Atlatl · CivIcon-Huns Marauders · CivIcon-Koreans Eupseong · CivIcon-Mayans Hul'che Javelineers · CivIcon-Spanish Inquisition
UniqueTechImperialDECivIcon-Aztecs Garland Wars · CivIcon-Huns Atheism · CivIcon-Koreans Shinkichon · CivIcon-Mayans El Dorado · CivIcon-Spanish Supremacy
AoE2-DLCicon-2 The Forgotten civilizations
UniqueTechCastle-DECivIcon-Incas Andean Sling · CivIcon-Italians Pavise · CivIcon-Magyars Corvinian Army · CivIcon-Slavs Detinets
UniqueTechImperialDECivIcon-Incas Fabric Shields · CivIcon-Italians Silk Road · CivIcon-Magyars Recurve Bow · CivIcon-Slavs Druzhina
AoE2-DLCicon-3 The African Kingdoms civilizations
UniqueTechCastle-DECivIcon-Berbers Kasbah · CivIcon-Ethiopians Tigui · CivIcon-Malians Royal Heirs · CivIcon-Portuguese Carrack
UniqueTechImperialDECivIcon-Berbers Maghrebi Camels · CivIcon-Ethiopians Farimba · CivIcon-Malians Torsion Engines · CivIcon-Portuguese Arquebus
AoE2-DLCicon-4 Rise of the Rajas civilizations
UniqueTechCastle-DECivIcon-Burmese Howdah · CivIcon-Khmer Tusk Swords · CivIcon-Malay Thalassocracy · CivIcon-Vietnamese Chatras
UniqueTechImperialDECivIcon-Burmese Manipur Cavalry · CivIcon-Khmer Double Crossbow · CivIcon-Malay Forced Levy · CivIcon-Vietnamese Paper Money
AoE2-DLCicon-5 The Last Khans civilizations
UniqueTechCastle-DECivIcon-Bulgarians Stirrups · CivIcon-Cumans Steppe Husbandry · CivIcon-Lithuanians Hill Forts · CivIcon-Tatars Silk Armor
UniqueTechImperialDECivIcon-Bulgarians Bagains · CivIcon-Cumans Cuman Mercenaries · CivIcon-Lithuanians Tower Shields · CivIcon-Tatars Timurid Siegecraft
AoE2Icon-LordsWest Lords of the West civilizations
UniqueTechCastle-DECivIcon-Burgundians Burgundian Vineyards · CivIcon-Sicilians First Crusade
UniqueTechImperialDECivIcon-Burgundians Flemish Revolution · CivIcon-Sicilians Hauberk
Dawn of the Dukes icon Dawn of the Dukes civilizations
UniqueTechCastle-DECivIcon-Bohemians Wagenburg Tactics · CivIcon-Poles Szlachta Privileges
UniqueTechImperialDECivIcon-Bohemians Hussite Reforms · CivIcon-Poles Lechitic Legacy
AoE2Icon-DynastiesIndia Dynasties of India civilizations
UniqueTechCastle-DECivIcon-Bengalis Paiks · CivIcon-Dravidians Medical Corps · CivIcon-Gurjaras Kshatriyas · CivIcon-Hindustanis Grand Trunk Road
UniqueTechImperialDECivIcon-Bengalis Mahayana · CivIcon-Dravidians Wootz Steel · CivIcon-Gurjaras Frontier Guards · CivIcon-Hindustanis Shatagni
AoE2Icon-ReturnRome Return of Rome civilizations
UniqueTechCastle-DECivIcon-Romans Ballistas
UniqueTechImperialDECivIcon-Romans Comitatenses
AoE2Icon-MountainRoyals The Mountain Royals civilizations
UniqueTechCastle-DECivIcon-Armenians Cilician Fleet · CivIcon-Georgians Svan Towers
UniqueTechImperialDECivIcon-Armenians Fereters · CivIcon-Georgians Aznauri Cavalry
Removed technologies
UniqueTechCastle-DECivIcon-Persians Boiling Oil · CivIcon-Saracens Camelry · CivIcon-Saracens Madrasah · CivIcon-Mayans Obsidian Arrows · CivIcon-Slavs Orthodoxy · CivIcon-Koreans Panokseon
UniqueTechImperialDECivIcon-Vikings Berserkergang · CivIcon-Persians Mahouts · CivIcon-Sicilians Scutage · CivIcon-Saracens Zealotry
Revised technologies
UniqueTechImperialDE Couriers · UniqueTechImperialDE Manipur Cavalry · UniqueTechImperialDE Paper Money · UniqueTechCastle-DE Royal Heirs
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