Amazon offers Prime members Far Cry 4 for Xbox One
with free shipping
. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $4.98.) That's $1 under last week's mention and the lowest total price we've seen. (It's also the best deal now by $19, outside of the mention below.)
A close price: Microsoft Store
has it for $14.99 with free shipping.