Alan Wake right now is on the humble bundle page right now and you can pay for a little as a dollar for both Alan Wake (best hidden gem on he Xbox 360) and Alan Wake: American Nightmares (which was okay) for the pc. As this is a humble bundle deal made for charity you can obviously pay for then a dollar, heck someone paid over $500 for this charity drive. If you interested click here for the Alan Wake Humble Bundle page. It ends in 6 days so act quickly.
Here my (rather old) review of Alan Wake and why I think everyone should play it: