I have bought the digital version of grand theft auto 4 on psn due to the sale and was hopeful to obtain the platinum in it but was disappointed to find no trophies were popping when they should have. So my question is, does gta4 digital have trophies in it? If not why
Grand Theft Auto IV originally released in April of 2008, at a point where trophies were not yet in existence. However, the game would later be patched to include trophies. If you check your trophies on the system though (under Account Management on the XMB where you see all trophies) does Grand Theft Auto IV appear as a game enabling trophies? If not this version of the game could either be a port of the trophy-less original or perhaps the game didn't install correctly? I'm not sure what the case may be exactly, but here's a similar discussion about the trouble unlocking trophies from the PlayStation Network version of Grand Theft Auto.
if you are playing on an old save that didnt had the trophies in the first place they are not enabled.
You need to update your ps3 to the latest firmware version and update GTAIV to the latest version then start a new game to have the trophies enabled.