GOG.com announced in their community forums earlier this morning that B-17 Flying Fortress: The Mighty 8th will be removed from their storefront on Thursday, December 29th, 2 PM UTC (9am EST). Although not yet confirmed for GOG.com, a Redux remake of the game has had a page on Steam for a while now with an unannounced release date. The remake is likely the cause for the original game’s removal, however MicroProse Software hasn’t confirmed if the original will be removed from Steam as well.
As of this writing the original game remains available on both GOG.com ($5.99) and Steam ($9.99). Thanks to Auster for submitting the news, I’ve added the date to the Watch List calendar and we’ll have a page up on the site later.