Which game is longer?

[Heshek]

I'm trying to find out which game has a longer game life (side quests/achievements/DLC) Alan wake or Final Fantasy 13

 

[Ando85]

Final Fantasy 13 by a long shot. The main story of the game will probably take 40-45 hours. If you decide to get all achievements that will take significantly longer post game. But, the post game achievements involve mostly huge amounts of grinding.

 

[Owlslayer]

I'm pretty sure FF13. Haven't played Alan Wake, but I've heard it's not that long. Not sure about the achievements, though.
But yeah, FF13 lasts quite a while, I think.

 

[Snork Maiden]

FF13 took me about 30-40 hours to complete the standard storyline, with a bit of mucking about on Pulse in there. I... don't even want to think how much grinding it would take to defeat the hardest monsters in the game (which still drop me in 2-3 hits) or how long it'd take to get the "every item" achievement.

 

[BlueberryMUNCH]

Final Fantasy by a massive, massive longshot.
Did I say massive?
A massive longshot.