Official patches sometimes force an online login even for single-player mode. Some users patch their EXE to disable the mandatory connection, allowing them to play GTA V on a limited internet connection or on a secondary PC without logging in.
If your game fails to launch after a patch or due to a missing , follow these standard recovery steps: Verify Integrity of Game Files : Right-click the game in your library → Properties Installed Files Verify integrity of game files Epic Games : Click the three dots next to the game → Rockstar Launcher My installed games Grand Theft Auto V Verify Integrity Exclusions for Security Software : Add your GTA V installation folder as an exception in Windows Security to prevent the launcher from being deleted during a scan. Manual Reinstallation of Launcher PlayGTAV.exe