Amazon is offering code OCTOFUN1 to take 25% off any title, excluding preorders or games less than 30 days old. Single use.
Sleeping Dogs is on sale already and is $22.50 with code.
Code expires pretty much when they decide to end it. This is sort of a test run for seeing how well code promotions will work. I'd use it sooner rather than later if you're interested.
Edited, Oct 3rd 2012 6:07pm by Jophiel
Wow. Regular ol' Joph fan club in here.