Update: Thanks to Major Nelson we've now got a full list of the available deals. Xbox 360 owners can take advantage of great discounts on Nordic Games titles such as Red Faction Armageddon, Darksiders and more until February 9. Full list at the link below.
Microsoft has shared its Xbox Deals with Gold for the week, which sees Far Cry (and the gold version) listed with 30% off the original asking price on Xbox One for Europe. As is the case with each promotion the company runs, you need to have an active Xbox Live Gold membership subscription.
There's also a promotion running for the Xbox 360 version of Far Cry 4. If you happen to reside in the US, the current Deals with Gold promotion covers Just Dance 2015 and Another World.
Source: Major Nelson