Bundle Stars offers Steam downloads of Middle-Earth: Shadow of Mordor Bundle for Windows for $4.99. That's tied with our mention from three weeks ago and the lowest price we could find by $11, outside the below offer. This bundle includes the DLC that you'd get with the Game of the Year Edition.
A close price: CDKeys offers downloads for $5.19. New customers can provide an email address on the CDKeys Facebook page to get a unique coupon code that cuts an extra 5% off.