Right-click the .7z file and select "Extract Here." You will get a single .iso file. Even though it is compressed, the final ISO might show as 1.2 GB (this is normal; the PS2 reads it as a 2.3 GB disc due to dummy data padding).
Reviewers often note that FIFA 14 on PS2, regardless of compression, feels outdated. It features robotic animations, stiff controls, and slower gameplay compared to its PS3 or PS4 counterparts. The FINAL Fifa Game on PS2 FIFA 14 PS2 Review fifa 14 ps2 highly compressed better
: Unlike newer mobile versions, the PS2 edition uses the established legacy physics engine that many players still prefer for its gameplay feel. Download and Size Details FIFA 14 PS2 Highly Compressed Better: The Ultimate