Based on the title of Oliver Stone's film Platoon, the aim of the game was for a caller to direct a blindfolded celebrity to use a gun to 'splat' small model hot air balloons, filled with paint. For this game, Ant and Dec always dressed up as World War I fighter plane pilots, complete with fake moustaches and pipes and spoke with old-fashioned accents.
A running gag involved Ant and Dec not realising that Cat's character ('Private Deeley') was a woman in drag. After SM:TV started to air episodes of Men in Black: The Series, the game was given a cosmetic makeover, replacing the hot air balloons with aliens and renaming it "Men in Splat".
Another recurring theme in the game was that the answer to the multiple-choice question for entry to the game was always B. Answers to the questions often matched this theme too, by starting with the letter B.