
Available for 3 civilizations
Powerful siege engine effective at destroying buildings and walls over a long distance.
Produced by
All units near an Outpost gain +0.5 move speed
Within 12.5 tiles of Fortified Outpost
Repairs nearby siege engines for 2 health every second.
Within 4.5 tiles of Machine Workshop
Blacksmith
Siege Works: New carpentry techniques increase the health of siege units by +20%.
Military Academy: Increase the production speed of infantry, cavalry, siege, and transport units at buildings by 33%. Does not affect religious units or other support units.
Siege Works (Improved): New carpentry techniques increase the health of siege engines by +30%. If Siege Works has already been researched, increase their health by +10% instead.
Machine Workshop
Lightweight Frames: Increase the movement speed of siege engines by +10%.
Reinforced Axles: Further increase the movement speed of siege engines by another +10%.
Pili Pao: Explosive Grenades hurled by Trebuchets and Nest of Bees smoke out enemy defenders, reducing attacked building damage by 20% for 8 seconds. Trebuchets and Nest of Bees gain +1 range.
Greased Axles: Increase the movement speed of siege engines by +15%.
Geometry: Increase damage of Trebuchets by +20%.
Greased Axles (Improved): Increase the movement speed of siege engines by +25%. If Greased Axles has already been researched, increase it by +10% instead.
Geometry (Improved): Increase damage of Trebuchets by +30%. If Geometry has already been researched, increase their damage by +10% instead.