GamesRadar writes: "Grand Theft Auto IV is too big, too deep, too overwhelming. You could spend dozens of hours in Liberty City and still overlook hundreds of hidden details. You could finish the storyline completely and still pass by some of the game's very best moments.
We're not talking about pigeons, stunt jumps, glitches or Easter eggs either. We're talking about entire characters, whole missions, secret sex scenes and phonebooks worth of must-see trivia.
If you're a 100% completist, you already know about most of these. If you're a regular player, on the other hand, you need to go back. If you blasted through GTA IV in a month, you need to reload. If you never hunted a sadistic serial killer, dated a sex-crazed socialite or researched Lazlow's criminal history, you need to read on..."