> For the complete documentation index, see [llms.txt](https://p3f.cep.one/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://p3f.cep.one/install/pcsx2-test-run.md).

# PCSX2: Test Run

## Introduction

**PCSX2** is a free, [open-source](https://pcsx2.net/download/releases/source-code.html) emulator for playing PS2 games on a PC.

Using a PCSX2 feature called **hostFS**, we can load mods into the emulated game at runtime without altering the original disc image.

P3F CEP includes a copy of PCSX2 1.7 that is pre-configured for P3F.\
You've already supplied PCSX2 with the files it needs, so let's give P3F a test run!

{% hint style="danger" %}
**P3F CEP only supports the build of PCSX2 included with the pack!**

The included build is specifically configured and tested for P3F CEP.\
We cannot guarantee functionality with any other builds or versions of PCSX2.
{% endhint %}

## Test Run

We're going to make sure PCSX2 can launch P3F before installing any mods.

### Launch P3F

* Open your **P3F Mods** folder and launch either: 
  * **Launch P3F Windowed.bat** or
  * **Launch P3F Fullscreen.bat**

<figure><img src="/files/rjKciWX5NfbxSux9T1HM" alt=""><figcaption></figcaption></figure>

* **PCSX2** will open and launch Persona 3 FES. Remember, no mods have been installed yet!

### Test P3F

* Make sure PCSX2 launches the game, plays the opening cutscene, and shows the title screen.

<figure><img src="/files/fgS3Ds0LEhlmHh5F8m9O" alt=""><figcaption></figcaption></figure>

* Once at the title screen, press **Enter** on your keyboard and make sure the game responds.

<figure><img src="/files/NNjtn2tZfHehfNMqkD0U" alt=""><figcaption></figcaption></figure>

<details>

<summary>Where are the mods?</summary>

You haven't installed them yet! We'll do that in the next step using Aemulus.

</details>

<details>

<summary>Why are the text and logos stretched out?</summary>

Persona 3 FES was originally developed for a 4:3 aspect ratio.

We're using PCSX2's built-in **widescreen patch** to play the game at a 16:9 aspect ratio, but we haven't installed the patches that correct the stretched UI yet.

We will install those patches in the next step.

</details>

<details>

<summary>An error message appeared.</summary>

* Did you forget to [**run CEP-o-matic**](/install/prepare-game-files.md)**?**
* Check the [**Troubleshooting**](/appendix/troubleshooting.md#pcsx2) page for more information.

</details>

## Moving On

* **Close PCSX2 completely** once you're ready to move on.
  * To exit fullscreen mode, double-click the game window.

We will come back to PCSX2 for advanced setup after installing mods.