For Battlefield 3 , this means that the 573 MB version you download may not be the full game. It's quite possible it only contains a portion of the single-player campaign, with the multiplayer mode (a major selling point of Battlefield) completely absent. The audio quality may be poor, you might be missing key visual effects, or the game could simply fail to run if critical, removed components are required.

[Unverified Download Source] │ ├─► Malware & Trojan Distribution (Steals data, drops Ransomware) ├─► Cryptojacking Scripts (Uses your CPU/GPU to mine crypto) └─► Infinite Installation Loops (Wastes hours decompressing corrupt data) 1. Malware and Trojans