Because Rockstar no longer supports the DVD version, you are legally entitled to patch the game to remove the DRM.
Grand Theft Auto IV v1.00 | GTA 4 | PC DVD | 2 DVD - Internet Archive GTA IV Disc 2.iso
If you own a GTA IV PC disc set:
: Most modern players download the game as a single digital file. Finding a standalone "Disc 2.iso" today usually suggests an old, incomplete pirated copy or a fan-made "creepypasta" mod designed to mimic the urban legends mentioned above. For those looking to experience the actual Grand Theft Auto IV Because Rockstar no longer supports the DVD version,
: A distorted model of Roman Bellic follows Niko from a distance. If you approach him, the game crashes, or a low-quality audio file of him asking to go bowling plays on a loop until you force-quit. Locked Interiors For those looking to experience the actual Grand
In 2020, Rockstar removed the original GTA IV from Steam and replaced it with "Grand Theft Auto IV: Complete Edition." This new version: