I enjoyed the first three but never bothered with Double Agent - I mean, I own it - and the Xbox version is much better than the 360 version, sadly - but I did enjoy the first three. Pandora Tomorrow and Chaos Theory were entertaining. Yeah, it's not GTA - it's not open world. It's fun though. If you go into it with the right expectations, it is solid. Double Agent tried to make it "edgier" and in the process made it "less good." I'd rent the older ones and give them each a try in turn.