# Triggers **Triggers** are used to fire **Actions** and **Conditions** when *something* happens. This *something* can range from the player pressing a certain key to an NPC's entering a certain area. ![(Example of a Trigger with the Input options open)](https://2174264233-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LAqwYovmUPn5V6CMeID%2F-LdyB0Vt3N1mIIi7L-36%2F-LAwvZicJAMxuRUBrR1-%2Ftriggers.jpg?alt=media\&token=23a5883c-ea3f-4d03-88e0-851de92e3ab3) {% hint style="info" %} Triggers are executed from **top** to **bottom**. {% endhint %} ## Advanced Options The white cog at the top right of the component there's an **Advanced Options** foldout. You can specify a minimum distance from which the **Player** has to be for this trigger to be activated. {% hint style="info" %} This is specially useful when dealing with pickup items or interactive doors. {% endhint %} There's also a shortcut option to create a [Hotspot](https://docs.gamecreator.one/game-creator/game-creator/hotspots) component from within the **Trigger**. ## Tips Some times you'll want a **Trigger** to execute an **Action** only once. You can easily take advantage of an **Action's** `DestroyAfterFinishing` property to destroy both the **Action** and the **Trigger**. To do so, simply add an **Actions** component inside the same **Game Object** where the **Trigger** is. After executing the **Actions**, it will destroy the entire **Game Object**. ## Available Triggers These are all the **Triggers** that come with **Game Creator**. You can download more at the [Game Creator Hub](https://hub.gamecreator.io), creating your own using our [Open API](https://docs.gamecreator.one/game-creator/systems/game-creator-api/custom-triggers) as well as find more inside each of the modules. ### Input | Trigger Name | Description | | -------------------------------- | -------------------------------------------------------------------------------------------------------------------------------------------- | | **On Cursor Raycast** | When the cursor is locked at the center of the screen, use this Trigger to throw a raycast from the center of the screen to simulate a click | | **On Hover Hold Key** | Detects when the mouse is over the Trigger's Collider and the user holds a key for a certain amount of time | | **On Hover Press Key** | Detects when the mouse is over the Trigger's Collider and the user presses a key | | **On Key Down** | Detects when the user presses a key down | | **On Key Hold** | Detects when the user presses a key down and holds it for a certain amount of time | | **On Key Up** | Detects when the user releases a key | | **On Mouse Down** | Detects when the user presses a mouse button down | | **On Mouse Enter** | Detects when the mouse hovers over the Trigger's Collider | | **On Mouse Exit** | Detects when the mouse exits hovering the Trigger's Collider | | **On Mouse Left Hold** | Detects when the mouse left button is being pressed for a certain amount of time | | **On Mouse Middle Hold** | Detects when the mouse middle button is being pressed for a certain amount of time | | **On Mouse Right Hold** | Detects when the mouse right button is being pressed for a certain amount of time | | **On Mouse Left Click** | Detects when the mouse left clicks on the Trigger's Collider | | **On Mouse Middle Click** | Detects when the mouse middle clicks on the Trigger's Collider | | **On Mouse Right Click** | Detects when the mouse right clicks on the Trigger's Collider | | **On Mouse Up** | Detects when a mouse button is released | | **Raycast Mouse World Position** | Detects when the mouse has clicked the Trigger's Collider and stores the point in a Variable | ### Character | Trigger Name | Description | | ------------ | ---------------------------------------------------------------------------- | | **On Step** | Detects when a Character makes a step (right foot, left foot or any of them) | | **On Jump** | Detects when a Character jumps | | **On Land** | Detects when a Character lands | ### Object | Trigger Name | Description | | --------------------------- | ------------------------------------------------------------------------------------------------ | | **On Collision Enter** | Detects when an object touches the Trigger's Collider area | | **On Collision Exit** | Detects when an object exits the Trigger's Collider area | | **On Player Enter** | Detects when the Player enters the Trigger's Collider area | | **On Player Enter Key** | Detects when the user presses a key and the Player is within the Trigger's Collider area | | **On Player Exit** | Detects when the Player exits the Trigger's Collider area | | **On Player Stay Timeout** | Detects when the Player has been at least some seconds inside the Trigger's Collider area | | **On Trigger Enter** | Detects when an object enters the Trigger's Collider area and has the isTrigger flag set as true | | **On Tag Enter** | Detects when an object with a certain tag enters the Trigger's Collider area | | **On Trigger Exit** | Detects when an object exits the Trigger's Collider area and has the isTrigger flag set to true | | **On Tag Exit** | Detects when an object with a certain tag exits the Trigger's Collider area | | **On Trigger Stay Timeout** | Detects when an object has been at least a few seconds inside the Trigger's Collider area | ### Variables | Trigger Name | Description | | ---------------------- | ----------------------------------------------------------------- | | **On Variable Change** | Detects when a Global, Local or List Variable changes its value/s | ### User Interface | Trigger Name | Description | | --------------------- | -------------------------------------------------- | | **On Mouse Enter UI** | Detects when the mouse hovers a UI element | | On Mouse Exit UI | Detects when the mouse exits hovering a UI element | ### **General** | **Trigger Name** | Description | | -------------------- | -------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | **On Event Receive** | Detects when a certain Dispatched Event is received. For more information on the Event System click [here](https://docs.gamecreator.one/game-creator/systems/event-system) | | **On Invoke** | Detects when a Trigger is manually invoked | | **On Disable** | Detects when the Trigger Game Object is disabled | | **On Enable** | Detects when the Trigger Game Object is enabled | | **On Load** | Detects when a game is loaded from a save file | | **On Save** | Detects when a game is saved | | **On Start** | Detects when the Trigger Game Object is initialized |