Amazon has Operation Flashpoint: Red River (PC) for $12.00 + FSSS or Prime.
Free One Day shipping when you shop with Discover Card: To enjoy free one day shipping on this item, add the item to your cart and select One-Day shipping at checkout. Enter promotion code DSCVRSHP and select your Discover Card as your payment method. Offer valid from February 15th, 2012 through March 31st, 2012, or while promotion funds last. Applies only to products sold by Amazon.com. Additional terms and conditions apply.