This game is like 2 games in one. The single player game has succeeded in creating the only virtual world that I cannot wait to jump back into when I get home everyday. It's that good. I never thought I'd get distracted by collecting plants, hunting animals and searching for treasure like I do in RDR.
The multiplayer, between free-roam, gang shoot-outs and unlocking new characters (and weapons) is a game unto itself - in the same addictive environment AND it is tremendous fun to boot!