Instead of risking your PC, you can get the real game safely and cheaply:
Many sites offering "highly compressed" versions of popular games are fronts for malware, spyware, or ransomware. Your PC's security is worth more than a few saved gigabytes.
Extreme compression requires your CPU to work overtime during installation. What should take minutes can take hours, often ending in "CRC errors" because a single bit was lost during the squeeze. A More "Helpful" Way to Play
To get a game that small, "repackers" often strip out essential files like high-quality textures, music, or even the cinematic cutscenes.