Has the Portal 2 $25 off coupon worked for you guys?
I went to Walmart and made them price match to the $39.99 deal that Gamestop was posting (you can't match to an online vendor) and then I pulled out my $25 off coupon from the vendor. It gave some trouble at first, failed to scan on paper but then I pulled it up on my phone and the barcode worked from there. I got Xbox 360 version for a total of $17.41. Just wanted to let you know that it worked for me. Share your success or misfortune!