AetherSX2 APK for Android: Download, BIOS, and Setup
AetherSX2 is a free PS2 emulator for Android built on the PCSX2 codebase. It is closed source and official development is suspended, and it needs a BIOS file dumped from your own PS2 console before it will run a single game. This page covers the real specs, the install steps, and what you actually need before you start.
AetherSX2 Quick Facts
| Field | Value |
| App name | AetherSX2 |
| Developer | Tahlreth |
| Category | PS2 emulator, Android port of PCSX2 |
| Latest version | v1.5-4248 |
| File size | 19.94 MB |
| Minimum Android version | 8.0+ |
| Architecture | 64-bit only (arm64-v8a) |
| License | Free, but closed source (CC BY-NC-ND 4.0) |
| Recommended hardware | Snapdragon 845 or equivalent |
| BIOS | Required, not included |
| Development status | Officially suspended |
| Sony affiliation | None |
What Is AetherSX2 APK?
AetherSX2 is an Android app that emulates the PlayStation 2, letting you play PS2 games on your phone. It’s built on PCSX2, the long-running desktop PS2 emulator, adapted for ARM chips by a developer known as Tahlreth.
The app itself is closed source. It doesn’t publish its own code, even though the emulation engine it’s based on comes from an open project. Official development has stopped, so v1.5-4248 is the last build Tahlreth released.
How Do You Download and Install AetherSX2 APK on Android?
Before you install anything, Android needs permission to accept an app from outside the Play Store. Follow these steps in order.
Allow Unknown Sources
Android blocks app installs from outside the Play Store by default. Open your phone’s settings, find the option for installing unknown apps, and turn it on for whichever app you’re using to download the file.
Download the APK
Use the download button on this page to get the AetherSX2 APK, then wait for the file to finish downloading before opening it.
Install the APK
Tap the downloaded file and confirm the install prompt. Review the permissions Android shows before you confirm, and only proceed if they look right for what a PS2 emulator needs.
Import BIOS
Open the app and go through the setup screens until you reach the BIOS import step. Select the BIOS file you dumped from your own console, not one downloaded from a random site.
Add Game Directory
Point AetherSX2 to the folder holding your game files. These need to be dumped from PS2 discs you own, the same rule as the BIOS.
Launch and Play
Once your games appear in the library, tap one to start playing. You can adjust graphics and controller settings from the in-app menu at any time. If something doesn’t work as expected, see our AetherSX2 not working guide.
What Are AetherSX2’s System Requirements?
| Requirement | Detail |
| Minimum Android version | 8.0 or higher |
| Architecture | 64-bit only (arm64-v8a). 32-bit devices are not supported |
| Recommended hardware | Snapdragon 845 or equivalent, 4 large cores |
Weaker phones may install fine but struggle with demanding titles. See our AetherSX2 best settings guide for adjustments.
Do You Need a BIOS File for AetherSX2?
Yes. AetherSX2 won’t boot a single game without one, and the BIOS isn’t included in the app. See our full AetherSX2 BIOS guide for the complete process.
- AetherSX2 requires a BIOS to run any game. It is not optional.
- Use only a BIOS file you have created from hardware you own, and check applicable local law.
- Import the dumped file during the app’s setup screens.
- Never download a BIOS file from a third-party website.
Is AetherSX2 Free, Safe, and Legal to Use?
License: AetherSX2 is free to download and use, but it isn’t open source. It’s distributed under a Creative Commons BY-NC-ND 4.0 license, which means no commercial use and no modified versions, and the app has no connection to Sony Interactive Entertainment.
Responsible use: Use only BIOS and game files you have the right to use, and check the law that applies in your jurisdiction.
Development Status: Official development is suspended. This site does not claim that any future official release is available.
What Features Does AetherSX2 Offer?
Save States
Save your progress anywhere in a game, not just at official save points.
Vulkan Rendering
Renders games using Vulkan or OpenGL, with Vulkan generally performing better on newer chips.
Resolution Upscaling
Scales PS2 games up past their original resolution for sharper visuals on modern screens.
Widescreen Patches
Adds widescreen support to games that originally only rendered in 4:3.
Controller Support
Works with touchscreen controls and Bluetooth controllers.
Per-Game Settings
Lets you tune graphics and performance settings individually for each game.
Disc Image Support
Loads games from ISO, CHD, and CSO disc image formats.
Pros and Cons of AetherSX2
Pros
- Free to download and use
- Performance depends on the device and game
- Save states, upscaling, and widescreen patches built in
- Supports both touchscreen and Bluetooth controllers
Cons
- Closed source, despite being built on an open emulator
- Official development has stopped
- No verified official update path is provided here
- Requires a BIOS you have the right to use
- 32-bit devices aren’t supported
Frequently Asked Questions
Conclusion
AetherSX2 remains a free, capable way to emulate PS2 games on Android, but it’s closed source and official development has stopped. Bring your own BIOS and games from hardware you own, check our AetherSX2 compatibility page for what actually determines performance, and if AetherSX2 itself isn’t a fit, our AetherSX2 alternatives page covers other options.