Wie Rockstar Games gegenüber der OnlineMag VideoGamer.com erklärt hat, wird es zum Action-Game Grand Theft Auto 4 keine Demoversion geben. Der Aufwand an Zeit und Arbeit hierfür wird als zu hoch eingeschätzt.

Diese Kosten will man stattdessen in die Entwicklung des Hauptspiels investieren, um es noch besser zu machen:

I'm sure there won't be. If there was we would have talked about it. With a game like this the guys at Rockstar North will want to spend every minute making the game look great. Most people know the concept of GTA anyway. I don't know that the demo is worth the time and effort.

Also much of GTA 4 is the driving around and we wouldn't be able to give out the whole city. We would have to give away half the game for free. People would think Liberty City is a tiny city. You run into problems.
Dafür steht inzwischen fest, dass der geplante Release im April eingehalten werden kann.

Quelle: News @ Videogamer