# Events

Cyber Engine Tweaks has builtin events which can be listened using the `registerForEvent()` function. These listeners must be registered inside the `init.lua` file.

Keep in mind that CET events *are not* game events. For example, [onInit](/cyber-engine-tweaks/cet-functions/events/oninit.md) doesn't mean the game the initializing, but rather that CET loaded mods and the game's Scripting API.

If you need to listen for game events, take a look at the [Observers](/cyber-engine-tweaks/cet-functions/observers.md) functions.

## Definition

```lua
registerForEvent(event, callback)
```

```lua
--
-- registerForEvent()
--
-- @param  string    event     The event name
-- @param  function  callback  The callback function
--
registerForEvent('event', function()
    
    -- event is triggered
    
end)
```

## Events Trigger Sequence

Here is a video showing when events are triggered in real-time:

<figure><img src="/files/5AhF4UlNPYkwJvCECNA6" alt=""><figcaption></figcaption></figure>

## Available Events

{% content-ref url="/pages/8e1rOlJURmk5D6jtIEVR" %}
[onInit](/cyber-engine-tweaks/cet-functions/events/oninit.md)
{% endcontent-ref %}

{% content-ref url="/pages/UFmFJkVvAl6d3f12kgIM" %}
[onUpdate](/cyber-engine-tweaks/cet-functions/events/onupdate.md)
{% endcontent-ref %}

{% content-ref url="/pages/ST8yu7nWAxX5rsaGnvbC" %}
[onDraw](/cyber-engine-tweaks/cet-functions/events/ondraw.md)
{% endcontent-ref %}

{% content-ref url="/pages/lDxUmRJpZV25EzZ9nFgk" %}
[onOverlayOpen](/cyber-engine-tweaks/cet-functions/events/onoverlayopen.md)
{% endcontent-ref %}

{% content-ref url="/pages/Fuph30NmfRp1A9BpTt8K" %}
[onOverlayClose](/cyber-engine-tweaks/cet-functions/events/onoverlayclose.md)
{% endcontent-ref %}

{% content-ref url="/pages/9D1YHuOBqbvjo2oSX7bA" %}
[onShutdown](/cyber-engine-tweaks/cet-functions/events/onshutdown.md)
{% endcontent-ref %}

{% content-ref url="/pages/lZ0cw7ZlxIhBqpWZC4nW" %}
[onTweak](/cyber-engine-tweaks/cet-functions/events/ontweak.md)
{% endcontent-ref %}


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