Borderlands 2 for PC - $28 at GreenMan Gaming for 24 hrs + 30% off promo code for other Borderlands / XCOM
Found something interesting on GreenMan though. If you're registered with them, as australian in your account details, and access the site on a non Australian IP address the price for Borderlands 2 shows as $49.99. Discounting that by 60% brings the price to $20 which is steaming bargain. I'm assuming that its showing the price in $AU not $US as it should be picking up my account settings. I know GreenMan do a lot of IP filtering - you can see the price, listings and titles change if you play around with a VPN.