Khel Khel Mein (Hindi: खेल खेल में; English: All in the game) is a 1975 Indian Hindi film directed by Ravi Tandon. The film's music (Ek main aur ek tu, and also Khullam khulla pyaar karenge) was composed by R.D. Burman and the lyrics written by Gulshan Bawra. The film stars Rishi Kapoor, Neetu Singh and Rakesh Roshan as college students, who play a prank and get involved with a notorious criminal. The film turns fast from fun and frolic to a taut thriller. Iftekhar and Aruna Irani also star in the film.
The story has been adapted from the English novel "Good children don't kill", written by Louis Thomas, the blind writer, and published in 1967.