Left 4 Dead 2, the 2009 sequel that arrived just a year after its predecessor, faced scrutiny not just for its rapid release, but also for its depictions of violence and language. According to Chet Faliszek, a writer and designer on the game, Valve strategically leaked the title's cinematic trailer to avoid issues with the Entertainment Software Ratings Board (ESRB).
Faliszek explained in a YouTube video that Valve was frequently in conflict with various countries and ratings boards, including the ESRB, over the series' mature content. He noted that a lawyer at Valve advised writers to be more cautious, leading to the removal of certain profanity. "One of [Valve's] lawyers stepped in and said that us writers needed to be babysat on this," Faliszek stated. "And so [the] first thing we did was, well, we made sure there was no profanity in there that crosses the line—basically F-bombs."
However, the ESRB's oversight extended beyond the game itself to its promotional materials. Faliszek highlighted that the rules for trailers differed from those for games, and content that might be permissible within a game could lead to a trailer being banned outright. This presented a challenge for Left 4 Dead 2's cinematic trailer, which Faliszek described as being no more violent or profane than the game itself.
To overcome this hurdle, Valve opted for a manufactured leak. "We leaked our trailer ahead of time, because they wouldn't let us release the trailer," Faliszek admitted. "I'll just admit that. I think we can't get in trouble for that now. It's like 20 years ago." This maneuver allowed the trailer to be seen by the public without directly violating ESRB guidelines for official releases, effectively bypassing the censorship that would have prevented its authorized distribution.