Finding PlayStation 2 games that can be "highly compressed" to under 50MB is rare because the standard PS2 CD-ROM capacity was roughly 700MB and DVD-ROMs went up to 4.7GB . However, through efficient compression techniques like

He wasn't in his room. He was in the game.

The ground beneath Leo’s feet began to glitch. A texture stretched infinitely, pulling him down. He realized with horror where he was. He wasn't just in a game. He was in a "Highly Compressed" file.

You will need extraction software.