An open-world game that follows the story of Toni Cipriani as he navigates the streets of Liberty City. With a vast open world to explore and a wide range of missions to complete, Grand Theft Auto: Liberty City Stories is an excellent addition to any PSP library.
If you find a "highly compressed" version of a 1GB game (like God of War highly compressed psp games under 100mb best
These games are naturally small or can be compressed to fit the 100MB threshold: An open-world game that follows the story of
Some AAA titles can be found in "Highly Compressed" formats, though they may lack audio or video: God of War: Chains of Olympus highly compressed psp games under 100mb best