I have sunk more hours into this game than any other game. Mostly online in Team Deathmatch, but that was nearly a decade ago. The world building is second to none, it feels real and there's nothing better than jumping in and zipping around the map for ten minutes. It's the definition of a sandbox game. The story is pretty much flawless, well acted, animated and paced, with plenty of variety. It's a masterpiece, with endless replayability. My only gripe is load time; that's what stopped me playing; I could spend 30 minutes before I got into a match I actually wanted to play.