This isn't a review, it is more my thoughts looking back on a particular game and it's place in my current-gen collection.
So I got GTA4 a few weeks after it was released last year. I haven't finished it yet, for reasons I'll mention later, but I guess I am around 75% through the storyline. I haven't really played any of the previous 3D world games seriously, though I did have one of the top-down old-school ones. The central concept of running around a city commiting 'felonies' and running over pedestrians seemed to me fairly childish so I mostly gave them a miss. GTA4 however was supposed to have a more mature, realistic story and came boasting hype and review scores you cannot easily ignore. Anyway, I got it and initially I had fun. The dialogue was often quite funny, particularly when it involved Roman. I liked the satirical billboards and TV shows, and the car radio is great - a lot of variety and enough songs I recognise and like. Killing a guy that deserved it and driving away in the rain listening to Tubular Bells was basically the highlight of the game for me.
So why haven't I finished it? Well, at some point I just realised I'd stopped enjoying myself. The flaws in the game design were accumulating while the motivation to continue was dropping. One of the main annoyances was definately the lack of checkpoints. The missions become increasingly longer as you go on in the game, yet still they never feature sufficient (or indeed any) checkpoints. Why does the game make me drive halfway across the map, rebuy the compulsory body armour and do the entire multi-stage mission again every time I die? Aside from being annoying in itself, this unforgiving set-up highlights and exacerbates the other frustrations in the game. I found the lack of recharging health and the necessity to find food to heal very tiresome. Several times driving around wounded I would stop the car, get out and try to enter restaurants, only to find that they weren't 'true' restaurants but only restaurant textures, sprayed onto the side of an empty box. Similarly I once tried to escape police by running through some gardens, and then through a house. Unfortunately the back door was just painted on and it was a quick death and a long way back to the checkpoint for me. In other words, though the world of the city is well designed and laid out and mostly realistic, the gameplay seemed to bump against the illusion and break it too frequently.

Annoying Jerk Boss #5
I guess in the end what really pushed me out of the game was the lack of involvement in the story and in Niko the main character. At the beginning he's quite interesting and he has a nice sardonic attitude to the lies Roman has been telling him about how great life is in America. Roman is in debt and so it makes sense for Niko to work off that debt doing various criminal jobs even though he'd rather not. But once those initial missions are done, the development falls flat. Niko just gets bossed around by a string of total jerks, and though he has enough awareness to question their motives and actions, you nevertheless have to do as you are instructed. At one point you go find an old Irish guy in a park, totally drunk and high, and he shouts at you and complains about how he's been accused of ratting someone out but he didn't really and anyway he's sorry. OK fine. Then Niko offers to go kill the guy who hasn't accepted the apology, and the junkie tells you to wipe out his friends too. So you do. This is just one of several missions that it seems Niko shouldn't accept and as a player I did not want to carry out. Other times you'll massacre your way to some named target victim and then be asked if you wish to spare him or not - shouldn't I have that option before I killed those 20 guys on the way in? If the story was such that Niko had to do more and more violent things he didn't want to do, upping the stakes each time as it was leaning toward in the beginning, then that could have been interesting. However, by this point in the game, Niko just didn't seem to care and was acting as nothing more than an amoral mercenary. There's nothing wrong with that in itself - its a feature of many game's central characters - but here it broke the story for me and I stopped caring about him.
I don't regret purchasing GTA4 and I enjoyed it upto a point. Perhaps if I carried on and reached the ending, it would justify the previous problems and make the experience more complete. At the moment I don't really feel inclined to put in the time to do it though, when there's other things to be playing I feel more involved in.