GUIDE · SCENARIO EDITOR
Trigger effects
A trigger effect carries out an action after its conditions are met, such as displaying a message, changing diplomacy, creating units, or updating an objective. Combining effects can make one event lead to the next part of a mission.

Overview
A trigger effect carries out an action after its conditions are met, such as displaying a message, changing diplomacy, creating units, or updating an objective. Combining effects can make one event lead to the next part of a mission.
How this system affects decisions
This rule affects scenario editor. Read the entry’s stated mechanics together with its requirements and related unit or technology pages; its practical value depends on which parts of that system are active in the current match.
How to use this reference
A trigger effect carries out an action after its conditions are met, such as displaying a message, changing diplomacy, creating units, or updating an objective. Combining effects can make one event lead to the next part of a mission. In custom scenarios, this tool or rule shapes the authored map rather than an ordinary ranked-match opening. Its effect depends on the objects, conditions, and player slots used in that scenario.
- Focus
- Scenario Editor
- Signature / category
- How it works
- Release / context
- Age of Empires II system
- Region
- Scenario Editor
- Classification
- Game systems