The Dark Knight was a major Hollywood blockbuster production by Warner Bros. that utilized both traditional and viral marketing techniques. An extensive viral marketing campaign that resembled an alternate reality game was launched 18 months before the film's release and involved puzzles, websites, and real-world activities that engaged fans. The film had massive commercial success due to this multifaceted marketing approach along with its wide theatrical distribution to over 4,300 theaters domestically, breaking previous records.