Yes, you read that right. The epic origin story of Kratos can be found in highly compressed formats. While the cutscenes might be heavily downgraded, the hack-and-slash gameplay is fully functional.

They are either:

Because the game is tiny, your computer can allocate more power to rendering. In PCSX2:

He remembered his tenth birthday. High definition. 4K resolution. File too large. Compressing. The memory became grainy. The colors washed out. The faces of his parents became blurry smudges.