Before attempting to run any version of FIFA 16, ensure your PC meets the actual hardware requirements. If your computer doesn't meet these specs, no amount of compression will make the game run smoothly. OS: Windows 7/8/8.1 - 64-Bit

These files take hours to unpack on your PC because your CPU has to work incredibly hard to decompress the heavily locked data. Safe Alternatives to Play FIFA 16 on PC

Websites offering a "10MB download" for a 15GB game are often deceptive. These files typically contain: Malware and Ransomware

To save space, repackers remove non-essential languages, lower the quality of audio files, or compress video cutscenes.

To put it bluntly:

Standard data compression algorithms (like ZIP, RAR, or 7z) reduce file sizes by removing redundant data. Even advanced, maximum-level repacks (such as those by FitGirl or KaOs) can only reduce a 15 GB game down to roughly 4 GB to 5 GB .

If you want FIFA 16 specifically for low-end PC gaming, here are your real options:

FIFA 16 FPS Calculator & System Requirements - Games - PC Builds

For the mainstream gamer, it’s a curiosity at best. For the student in a remote town with a Pentium PC and a 2G connection, it’s a window to a global pastime—a way to participate in the culture of football gaming when the official version remains out of reach.