Download the free version from the Google Play Store or the official website.

Does it look pretty? No. The compressed audio crackles. The Titan textures smear into grey blobs. The text is often in broken English or untranslated Japanese.

Search for reputable sites or forums (like Reddit, romsfun, or telegram channels like PPSSPP Highly Compressed ) to download the Attack on Titan Highly Compressed.iso file.

This is the famous web-based fangame by Feng Lee . While not for PSP, it runs on any potato laptop. You can play it in a browser window if the emulation route fails. It has better graphics than the PSP version and similar ODM mechanics.