Epic did that in GoW. I thought it was retarded to pay 8 bucks for 4 maps, but everyone did it when it included more achievement points. At least this is free and probably you get more than you pay for.
Anonymous at 13:13 27/6/2008
there are a lot of achievement whores out there. i bet if they added achievements AND a $10 pricetag to the content, a lot of people would pay the cash
Anonymous at 12:42 27/6/2008
They forgot to add the most important thing--additional achievements on the 360 version