---
key: mechanic/game-mechanics--gm-location-triggered-event
type: mechanic
id: game-mechanics--gm-location-triggered-event
lang: en
title: Location-triggered event
summary: Entering a specified area triggers an event.
updatedAt: '2026-10-22'
status: active
url: >-
  https://gamemechanics.pro/en/knowledge/mechanic/game-mechanics--gm-location-triggered-event/
jsonUrl: >-
  https://gamemechanics.pro/api/v1/knowledge/en/mechanic/game-mechanics--gm-location-triggered-event.json
markdownUrl: >-
  https://gamemechanics.pro/content/knowledge/en/mechanic/game-mechanics--gm-location-triggered-event.md
aliases: []
tags:
  - Game design techniques
  - Scripted
sourceIds:
  - source-6a0730494d20148a
  - source-ee02a34f15567347
  - source-8aa111c7dbadde42
sources:
  - id: source-6a0730494d20148a
    title: 'Game Mechanics: Location-triggered event'
    url: 'https://gamemechanics.org/patterns/location-triggered-event'
    verifiedAt: null
  - id: source-ee02a34f15567347
    title: Doom 3 (2004)
    url: 'https://gamemechanics.org/patterns/location-triggered-event/game/doom-3'
    verifiedAt: null
  - id: source-8aa111c7dbadde42
    title: 'F.E.A.R. 2: Project Origin (2009)'
    url: >-
      https://gamemechanics.org/patterns/location-triggered-event/game/f-e-a-r-2-project-origin
    verifiedAt: null
relations: []
placements:
  - catalogId: game-mechanics
    id: gm-location-triggered-event
    title: Game design techniques
    url: >-
      https://gamemechanics.pro/en/mechanics/game-mechanics/#gm-location-triggered-event
    categoryIds:
      - gm-category-scripted
supersededBy: []
attributes:
  preview:
    updatedAt: '2026-10-22'
    title: Location-triggered event
    description: Entering a specified area triggers an event.
    image:
      src: images/mechanics/world-location-triggered-event.webp
      width: 600
      height: 340
      game: Doom 3
      sourceUrl: 'https://gamemechanics.org/patterns/location-triggered-event'
      originalUrl: 'https://cdn.gamemechanics.org/webm/doom_3_hanging_man.webm'
      sourceFrameSeconds: 4.04
      credit: id Software; frame from clip via GameMechanics.org
      rights: >-
        Game imagery © its respective rights holders. Source host:
        GameMechanics.org. Visible source watermarks preserved. All rights
        reserved; excluded from MIT and CC BY 4.0.
      caption: An enemy appears from an upper opening in the corridor
      alt: 'Doom 3: An enemy appears from an upper opening in the corridor.'
      markers:
        - x: 57
          'y': 44
          label: Enemy appearing on approach
    tips:
      - Define retrigger behavior and test approaches from different directions.
    examples:
      - title: Doom 3
        url: 'https://gamemechanics.org/patterns/location-triggered-event'
endsAt: null
provenance: >-
  Editorial reference index based on the 199 public Game Mechanics pattern pages
  checked on 2026-10-20. Original concise RU/EN definitions by
  gamemechanics.pro; pattern names, category associations and game-reference
  URLs retained from gamemechanics.org. The source gallery includes a film
  analogy. Linked materials retain their original rights; references are
  upstream attributions, not independent verification.
license: CC-BY-4.0
codeLicense: MIT
attribution: gamemechanics.pro contributors
catalogKey: catalog/game-mechanics
---
# Location-triggered event

id: game-mechanics--gm-location-triggered-event
type: mechanic
key: mechanic/game-mechanics--gm-location-triggered-event
lang: en
status: active
url: https://gamemechanics.pro/en/knowledge/mechanic/game-mechanics--gm-location-triggered-event/

Entering a specified area triggers an event.

## At a glance

![Doom 3: An enemy appears from an upper opening in the corridor.](https://gamemechanics.pro/images/mechanics/world-location-triggered-event.webp)

[Doom 3](https://gamemechanics.org/patterns/location-triggered-event) · Game imagery © its respective rights holders. Source host: GameMechanics.org. Visible source watermarks preserved. All rights reserved; excluded from MIT and CC BY 4.0.

[Source recording](https://cdn.gamemechanics.org/webm/doom_3_hanging_man.webm), 4.04 s

1. Enemy appearing on approach

- Define retrigger behavior and test approaches from different directions.

- [Doom 3](https://gamemechanics.org/patterns/location-triggered-event)

## How it works

Entering a specified area triggers an event.

## Variants

### How the technique works

<a id="gm-location-triggered-event-rule"></a>

- Entering a specified area triggers an event. <a id="gm-location-triggered-event-definition"></a>

## Context and limits

All 199 Game Mechanics entries at the check date: player actions, systems, presentation techniques and contested patterns. Entries are grouped by their first source-card category; all categories appear in their descriptions. Definitions use original wording. References link to game-specific galleries; images and videos remain at the source.

## Connected materials


## Sources and provenance

Editorial reference index based on the 199 public Game Mechanics pattern pages checked on 2026-10-20. Original concise RU/EN definitions by gamemechanics.pro; pattern names, category associations and game-reference URLs retained from gamemechanics.org. The source gallery includes a film analogy. Linked materials retain their original rights; references are upstream attributions, not independent verification.

- [Game Mechanics: Location-triggered event](https://gamemechanics.org/patterns/location-triggered-event) (id: source-6a0730494d20148a)
- [Doom 3 (2004)](https://gamemechanics.org/patterns/location-triggered-event/game/doom-3) (id: source-ee02a34f15567347)
- [F.E.A.R. 2: Project Origin (2009)](https://gamemechanics.org/patterns/location-triggered-event/game/f-e-a-r-2-project-origin) (id: source-8aa111c7dbadde42)

CC-BY-4.0 · gamemechanics.pro contributors