In the achievments it says you can unlock cortana. What does that mean, what happens? Cheers
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I think it's one of the two achievements you get for beating the level 'Cortana.' One is unlocked when you beat the level on Normal, Heroic, or Legendary. The other is unlocked when you finish the level with 15,000 or more points.
You just have to beat the level Cortana, OR if you mean to say Katana, then you have to get all the achievments (not including the secret ones) and all the skulls. Then you unlock a katana that your guy can wear on his back. Its really sweet and I've almost got it, just need the overkill and mvp thingy :P
One achievement is beating that level on a difficulty of Normal or above.
Unlocking Cortana will not only give you points towards achievements, but help you complete the game.
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