Age of Empires II
Bridges provide land units passage over bodies of water and block ships. This is accomplished not by actually allowing units to cross, but by automatically placing unique Shallow tiles beneath the Bridge that allow land units to cross, but not ships unlike common Shallow tiles. This is why units cannot be directly placed on Bridges that are placed over water in the Scenario Editor.
Bridges can neither be attacked nor even selected, and are permanently on the map. As such, they may be considered as more like terrain elements in the vein of Mountains and Cliffs, than actual structures. However, Bridges can be owned by a player and provide with their LOS of 6, which is not affected by researching Town Watch and Town Patrol. Bridges never change ownership (not even Gaia ones) and can only be placed diagonally in the Scenario Editor.
Though bridges cannot be attacked and destroyed, there are ruined bridge sections in the Scenario Editor, which can be used for storytelling purposes (e.g. the player's units discovering that "the bridge is out" in the scenario An Unlikely Messiah, forcing them to head north and take the Transport Ships in a village). A ruined section can also replace an intact one through a scripted Trigger, making it appear that the bridge is destroyed during a game (e.g. Pax Mongolica).
As of Age of Empires II: Definitive Edition, there are four different looking bridges, each with N-S and W-E variants:
- A stone brick bridge with small arches introduced in The Age of Kings.
- A small wooden bridge introduced in The Forgotten. This bridge is only one tile thick instead of four like the others, and looks similar to the walking sections of the Dark Age Dock.
- An Asian-looking stone bridge with larger arches and small decorative pillars introduced in Rise of the Rajas.
- A new stone bridge intermediate between the other two, with large arches and lateral angular projections, introduced in the Definitive Edition.
Age of Mythology
Bridges in Age of Mythology function as a Scenario Editor-only embellishment object, according to its animation files, it was intended to be built, but not placed. The Bridge was most likely a campaign object that was used as a plot-device, and had to be built in order to cross (most likely to attack Gargarensis's forces) an area of water. It takes the appearance of a large wooden bridge.
The Bridge is unfinished, as it is extremely oversized, lacks a shadow/selection box, and does not allow units to travel over it.
Age of Empires III
|Unconstructable buildings in Age of Empires II|
|The Age of Kings|
|Bridge · Cathedral · Dome of the Rock · Great Pyramid · Mosque · Pavilion · Pyramid · The Accursed Tower · Sea Gate · Sea Tower · Sea Wall · The Tower of Flies · Trade Workshop · Yurt|
|Amphitheatre · Aqueduct · Arch of Constantine · City Wall · Colosseum · Fire Tower · Fortified Palisade Wall · Fortress · Gol Gumbaz · Poenari Castle · Quimper Cathedral · Temple of Heaven · Wooden Bridge|
|The African Kingdoms|
|Barricade · Fence · Granary · Hut · Palace · Fortified Tower · Storage · Tent|
|Rise of the Rajas|
|Army Tent · Sanchi Stupa|
|The Last Khans (Definitive Edition)|
|Aachen Cathedral · Chain · City Gate · Dormition Cathedral · Rock Church · Sankore Madrasah · Shrine · Tower of London|
|Lords of the West|
|Dawn of the Dukes|
|Dynasties of India|
|Minaret of Jam|