Game is rated as PEGI-16 in it's original US/EN version, however in Poland it's rated as PEGI-18, since Polish dubbed version contains more mature language.
If you let the game "idle in game" for a few minutes, the 4 main soldiers will have funny banter between each other.
During the campaign, Sweetwater makes a reference to Butch Cassidy and the Sundance Kid (1969), Haggard makes a reference to Predator (1987), Tremors (1990), as well as Air Force One (1997), and Redford makes a reference to The Proposition (1998).