"Highly Compressed" means the original ISO file (which is usually around 1 GB to 1.5 GB) has been compressed using advanced tools to a tiny size of approximately . This makes it incredibly easy to download and share.

Instead:

Pro Evolution Soccer (PES) is a legendary soccer video game series that has been entertaining gamers for decades. With PPSSPP, you can play PES on your Android device, enjoying its iconic gameplay and nostalgic value.

of the game is a sought-after alternative to the standard multi-gigabyte ISO files Understanding Highly Compressed Files

None of these will reach 100 MB unless heavily stripped.