Ps1 Highly Compressed Games -

of their original size for storage on handhelds and mobile devices.

Technically impressive for its use of in-engine cutscenes instead of bulky FMVs. Castlevania: SOTN ~30–50 MB Ps1 Highly Compressed Games

Data Shrinkage in the 32-Bit Era: The Mechanics of PS1 Game Compression of their original size for storage on handhelds