If you find the performance of Persona 3 Reload to be a little lacking, perhaps try out the latest Proton Hotfix update that Valve just released. For Steam Deck players, you may also want to be on the Preview update branch which also recently had a performance fix too.
Valve's Pierre-Loup Griffais posted on X (formerly Twitter):
Post text: "A Proton Hotfix with additional performance improvements for Persona 3 Reload has just been deployed."
To change the Proton version used for a game:
- In Steam:
- Desktop: right click a game and go to Properties.
- Steam Deck / Big Picture Mode: find the game in your library, go to the little cog on the right and then select Properties.
- Compatibility menu -> Tick the box, select Proton Hotfix from the drop-down menu.
You can buy Persona 3 Reload from: