| ID | Interpret | Skladba | Album | |
| 1. | Cowboy Bebop | Gotta Knock A Little Harder | Cowboy Bebop Soundtrack |  |
| 2. | David Young | 2008-07-27: Knock, Knock: Looking for an Open Door | Grand Avenue Baptist Church 2008 | |
| 3. | Jen and Corey | Bucket Episode 6 - Knock Knock... | Bucket | |
| 4. | Godfrey | Dalek Knock-Knock Joke | Random Crap from my projects folder | |
| 5. | Mary Anne Hobbs | Mike Slott - Knock Knock | Wild Angels clips | |
| 6. | Fergus & Geronimo | Harder Than It's Ever Been | Harder Than It's Ever Been 7 | |
| 7. | Album | i'll try harder | Delhotel Records Sampler | |
| 8. | Album | i'll try harder | Delhotel Records Sampler | |
| 9. | Alex Barnett | Try Harder | | |
| 10. | Fergus & Geronimo | Harder Than It's Ever Been | Harder Than It's Ever Been 7 | |
| 11. | Fergus & Geronimo | Harder Than It's Ever Been | Harder Than It's Ever Been 7 | |
| 12. | DJ Tronic | HARDER - CD 2 | HARDER | |
| 13. | The GO | Try A Little Harder | Supercuts | |
| 14. | The GO | Try A Little Harder | Supercuts | |
| 15. | DJ Tronic | HARDER - CD 1 | HARDER | |
| 16. | DJ Tronic | HARDER - CD 2 | HARDER | |
| 17. | DJ Tronic | HARDER - CD 1 | HARDER | |
| 18. | Joe Strummer & the Mescaleros | The Harder They Come | Live at Virgin NYC 7/24/01 |  |
| 19. | Sack The DJ feat. The Rockstar Philospher | Try Harder | | |
| 20. | Drake | Try Harder | Room For Improvement |  |
| 21. | Joe Strummer & the Mescaleros | The Harder They Come | Live at Virgin NYC 7/24/01 | |
| 22. | Public Enemy | Harder Than You Think | Terry Urban & Orisue Clothing | |
| 23. | Public Enemy | Harder Than You Think | How You Sell Soul To A Soulless People Who Sold Their Soul??? | |
| 24. | Flunky | Harder | Album | |
| 25. | Public Enemy | Harder Than You Think | How You Sell Soul To A Soulless People Who Sold Their Soul??? | |
| 26. | Public Enemy | Harder Than You Think | How You Sell Soul To A Soulless People Who Sold Their Soul??? | |
| 27. | Public Enemy | Harder Than You Think | Remixes, Rarities & Singles | |
| 28. | Public Enemy | Harder Than You Think | How You Sell Soul To A Soulless People Who Sold Their Soul??? | |
| 29. | Public Enemy | Harder Than You Think | How You Sell Soul To A Soulless People Who Sold Their Soul??? | |
| 30. | ElectroSound | Harder, Harder, HARDER, HARDER! | Kitsune Maison Mashed 2 | |
