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>you can't go into a burger shot in GTA V
>GTA V has no story expansions
>nothing added to single player
the only things that V has over IV is overall visual fidelity and character/car customization.
and perhaps an argument could be made about the gameplay, as GTA IV did have a slower pace to gunfights, as animations for actions such as switching weapons or peaking out of cover were longer
you could say IV is the Dark Souls of GTA games