UPDATE 4pm: Microsoft has just confirmed its offer of a free Borderlands: The Handsome Collection copy - but it is time-limited. The game will only be unlocked this weekend, ending on 30th October.
That said, anyone will be able to download the game whether they have a Gold subscription or not.
Those without a Gold subscription will also be able to enjoy a weekend of free multiplayer gaming - perfect for playing Borderlands with a buddy.
ORIGINAL STORY 11am: Borderlands: The Handsome Collection is free to nab right now on Xbox One.
You can set your download going via this page on Microsoft.com.
Microsoft has yet to announce anything officially regarding the deal, but the game has been spotted on the Xbox app as being listed as a Free Play Days game (thanks, NeoGAF).
This promotion has been known to crop up from time to time - usually over weekends - to offer full games for a limited time only.
The only difference with Borderlands is that Xbox One owners who don't have a Gold subscription also seem to be able to download the game. Usually the offer is for Gold subscribers only.
Borderlands: The Handsome Collection contains Borderlands 2 and Borderlands: The Pre-Sequel and all of its DLC, along with the option of transferring save data over from Xbox 360.
We'll update if we hear anything from Microsoft officially, or if it decides the whole thing was an error.