Preorder Super Mario Galaxy 2 at Amazon, get $20 off a future game purchase

Amazon is offering a rare promotion where you can preorder your copy of Super Mario Galaxy 2 and in return you will receive:

 

  • Free launch day shipping (receive the game the day it’s released)
  • $20 off a future videogame purchase at Amazon.com

 

This effectively makes the price of the game $30.  GOGOGOGOGOGOGOOGOGOGO