Battlefield: Bad Company 2: Vietnam is an expansion pack for Battlefield: Bad Company 2 and an indirect sequel to Battlefield Vietnam, borrowing heavily from it while still retaining the core gameplay of the base game. When playing the expansion, players are not allowed to utilize their unlocked modern weapons or specializations used in the base game.
Era specific character models and character dialog.
Addition of the Flamethrower as an infantry weapon and on tanks (replacing the Co-Axial MG for the Alternate Weapon Package), which can affect players and their surroundings alike.
Helicopters can take bullet damage from small-arms fire.
The add-on received mainly positive reviews. The Xbox 360 version was given an 88 on Metacritic based on 28 reviews, with scores ranging between 100 and 80. The PlayStation 3 version of the game received an 88, however based on only 15 reviews and with the same score range. The PC version received an 86 with scores ranging between 100 and 79, though based on only 15 reviews. It is important to note that all the versions are essentially identical.
Critics generally praised the new content and game balancing and commented on how the expansion prevents from creating "more of the same", referring to the difference from the base game. The praise ranged from Battlefield: Bad Company 2: Vietnam being named one of the best multiplayer experiences of the year, to being called worth its price for the new content.
GameSpot gave it an 8.5 out of 10, saying that "If you strayed from Battlefield: Bad Company 2 once you reached maximum level or are new to the game and want a good reason to show off your elite shooting skills, the Vietnam add-on is your ticket to big explosions, big shoot-outs, and big thrills. And you get it all for $15."
IGN gave it a 9.5 out of 10, saying that "Battlefield fans will probably argue over whether to play Bad Company 2 or its expansion in the months to come. But when it comes to choosing between arguably the best multiplayer game of the year and its excellent expansion, that seems like a good problem to have."
PC Gamer gave it 90 out of 100, saying that "During ten hours in the jungle, I’ve seen enough shit to ruin my psyche for life – my immediate response is still to helicopter myself back in for another tour of duty. DICE’s take on the unwinnable war is a total victory."
The expansion was showcased by DICE at the Tokyo Game Show 2010 (September 16–19, 2010), revealing in-game footage for the first time. Since then, they had been gradually revealing information on the Battlefield Blog up until it's release.
One picture in the Battlefield: Bad Company 2: Vietnam Official Art Work Template shows a Rifleman from Battlefield 1943.