Xbox One owners who pre-order the digital version of Fallout 4 from the Xbox Games Store will receive a free download code for Fallout 3 on Xbox 360.
Bethesda confirmed the news, adding that Fallout 3 codes will be distributed within 7-10 days of the pre-order.
This code will work with the Xbox 360 and Xbox One – once backwards compatibility access is made available.
Fallout 4 is priced at £59.99 on the Xbox Games Store. The game launches on Tuesday, November 10th, 2015.