The fourth studio album by the hip hop group, originally released in May 1988. The album was produced by the group members themselves, Davy D. and Rick Rubin. Features the singles 'I'm Not Going Out Like That', 'Mary, Mary' and 'Run's House'.

Track Listing:
1. Run's House - Run-D.M.C. (3.21)
2. Mary, Mary - Run-D.M.C.
3. They Call Us Run-D.M.C. - Run-D.M.C.
4. Beats to the Rhyme - Run-D.M.C.
5. Radio Station - Run-D.M.C.
6. Papa Crazy - Run-D.M.C.
7. Tougher Than Leather - Run-D.M.C.
8. I'm Not Going Out Like That - Run-D.M.C.
9. How'd Ya Do It Dee - Run-D.M.C.
10. Miss Elaine - Run-D.M.C.
11. Soul to Rock and Roll - Run-D.M.C.
12. Ragtime - Run-D.M.C.

Year of Production: 1988