DICE's well-received 2010 FPS Battlefield: Bad Company 2 is currently half off on multiple platforms, with its Vietnam expansion completely free on at least one system. The shooter is marked down to $10 on Xbox 360, while the Vietnam expansion doesn't cost anything. Bad Company 2 plays on Xbox One with backwards compatibility, and if you're an EA Access member, you've been able to play it for free since January.
On PC, Origin users can get Bad Company 2 for $10 as well and the Vietnam expansion for $7.50, which is half off its normal $15 price. Bad Company 2's Vietnam expansion includes four maps based on locations from the Vietnam War, as well as 15 weapons and six vehicles from it. There is also music of the time, including Creedence Clearwater Revival's "Fortunate Son," the lyrics of which are about the Vietnam War.