A repack typically involves several technical modifications to the original software files:
setup.exe (not the whole game, just the installer). Look for >5 detections from major engines (Kaspersky, Bitdefender). If only low-tier AVs flag it, it’s likely a false positive.101mrar was a solid choice in the early 2010s but has been eclipsed by FitGirl (best for low bandwidth) and DODI (best for speed). 101mrar repack
For those who choose to use repacks: