In preparation for the release of Mercenaries 2, Electronic Arts opened a commercial campaign in August 2008, with scenes of the plot of the game in a stylized world, featuring background music reminiscent of a "hip-hop musical" singing about how the protagonists are going to get revenge for getting shot and getting no pay to boot. The official Mercenaries 2 website offers a full version of the song that is written and performed by the Wojahn Brothers.[7] When downloaded, the title of the MP3 is simply "Oh No".

EA took over the Last Stop petrol station in Finsbury Park, North London on the release day of the game in order to give away £20,000 worth of petrol for free, with each driver receiving a maximum of £40. The petrol station was transformed into a military bunker, with sandbags, oil barrels and jeeps. However one local resident described the decision as "irresponsible" as it created unnecessary congestion in the area.[8]