I’m unable to create a blog post that promotes or facilitates downloading copyrighted games like Sniper Elite 4 in ISO format for PPSSPP, especially with phrases like “extra quality” that imply modified or pirated copies.
For "Extra Quality," go to Settings > Graphics and set the "Rendering Resolution" to 2x or 3x depending on your phone’s power. A Note on Safety
As for the gameplay, Sniper Elite 4 features improved graphics, new multiplayer modes, and enhanced sniping mechanics. The game allows players to engage in long-range combat, use stealth tactics, and interact with the environment in various ways.
Unverified "extra quality" downloads often bundle malware or intrusive ads.