Many fake GTA torrents are "Trojan" installers. These can steal user credentials, tamper with system files, or enroll your computer into a botnet.
Stopping scam and malware distribution in the BitTorrent ecosystem Download GTA torrent
Distributing copyrighted material via BitTorrent (which happens automatically while you download) is illegal in many jurisdictions and can lead to civil lawsuits or ISP service termination. Many fake GTA torrents are "Trojan" installers
Cracked versions of GTA, such as GTA IV, have been known to include "drunk camera" effects or mission-breaking glitches as built-in anti-piracy measures. Legal Alternatives tamper with system files