I have another gaming question for everyone here.

Which game should I buy/play first, Ninja Gaiden Sigma 1 (PS3) or Yakuza 3 (PS3)?

I want to get both, but I'll only have enough money for one of them in May 2014.

(I'm already getting Prototype 1 (PS3) in March and Dragon Age Origins: Ultimate Edition (PS3) in April)