|This article is about the non-playable team. For the goddess in Age of Mythology, see Gaia (Goddess).|
Gaia is a non-playable team in Age of Empires and Age of Empires II, to which all the natural environment units found around the map belong. The Age of Mythology and Age of Empires III equivalent to Gaia is Mother Nature. It's actually possible to play as animal units in Age of Empires, and Age of Empires II by entering the code Gaia.
In Age of Empires if a human unit, Sheep, Turkey, or Horse is placed under GAIA's control in Create Scenario, it will become the possession of a player's team should one of his/her units come across it. This is a common method used in campaigns, and can sometimes be used to place secret units on a map, obtainable through exploration.
All Predator, Huntable, and Herdable can wander in a specific area, whilst in Age of Empires and Age of Empires II non-herdable prey animals will run away from non-gaia units, this was meant to feature in Age of Mythology but was cut before release. In Age of Empires III huntable creatures will only run when attacked by Settler-type units.
- Using the cheat code 'gaia' in Age of Empires II and checking the tech tree will crash the game due to Gaia not being an actual civilization and thus having no data there.
- Using the cheat code "SET ASCENDANT" in Age of Mythology will allow the player to control every animal in the map, except for those owned by their enemies.
- In Age of Mythology Mother Nature has a unique Greek UI, although this is only seen when a scenario is playtested via the Scenario Editor. According to early screenshots, this was the original Greek UI before it was changed.