| 1997 | The Beat Kicks | Sy & Unknown | 1 |
| 1997 | Voodoo / Moments in Time ('97 remix) | Sy & Unknown | 1 |
| 1998 | Distant Love / Bang da Beat | Sy & Unknown | 1 |
| 1999 | Better Day (remix) / Bring It Back | GBT Inc. / Sy & Unknown | 1 |
| 1999 | Discoland (remix) / Head in the Clouds | Sy & Unknown | 1 |
| 1999 | What Is a DJ / Cape Fear (Remixes) | Sy & Unknown | 1 |
| 2000 | Power Pitchin / Foolish Jealousy | Sy & Unknown | 1 |
| 2001 | Hey Boy / Are You Afraid? | Sy & Unknown | 1 |
| 2001 | Won't You Rock With Me? / Clap Your Hands Everybody | Sy & Unknown | 1 |
| 2002 | Bring Me Round to Love (remix) / Aural Illusion | Sy & Unknown | 1 |
| 2002 | Gonna Get Ya (The Remixes) | Sy & Unknown | 1 |
| 2003 | Devotion / Dreadland (The Remix) | Sy & Demo / Sy & Unknown | 1 |
| 2003 | Bring Me Round to Love | Sy & Unknown | 1 |
| 2003 | Vigilante Hardcore / Listen to the Ace (Slipmatt remix) | Sy & Unknown vs. DJ Seduction | 1 |
| 2003 | Techno Harmony 2003 / Angelic Hardcore | Sy & Unknown | 1 |
| 2003 | The Product of the Devil / Brain Wave | Sy & Unknown | 1 |
| 2004 | Keep the Crowd Jumpin' / Innovate & Stimulate | Sy & Unknown | 1 |
| 2005 | Rock Ya Hardcore / I Feel on Fire (Remixes) | DJ Kurt / Sy & Unknown | 1 |
| 2005 | It Goes on & On / Aural Illusion (Remixes) | Picco / Sy & Unknown | 1 |
| 2005 | Do We Have to Say Goodbye? / Sounds of the Underground | Sy & Unknown | 1 |
| 2005 | I Feel on Fire / Make It Bounce | Sy & Unknown | 1 |
| 2005 | Let It Go / Rock It Like This | Gammer / Sy & Unknown | 1 |
| 2005 | The Player / Out of Your Mind | Sy & Unknown | 1 |
| 2006 | U R My Phantasy | Sy & Unknown Feat. Lou Lou | 2 |
| 2006 | Like the Sun / We're Rocking This Place (Remixes) | Trinity / Sy & Unknown | 1 |
| 2006 | Pacific Sun (Sy & Unknown Remix) / Product Of The Devil 2006 | Force & Styles / Sy & Unknown | 2 |
| 2006 | Angels / Hardcore Ride | Footprintz / Sy & Unknown | 1 |
| 2006 | Free Your Mind / Make It Bounce (Remixes) | CLSM / Sy & Unknown | 1 |
| 2007 | Break the Spell 2007 / Gotta Have House | Sy & Unknown | 1 |
| 2007 | Be With You / Feels So Good | Sy & Unknown Feat Lou Lou / Sy & Unknown | 1 |
| 2007 | The Time of Our Lives / Rockin' to the Music | Sy & Unknown | 3 |
| 2007 | Believe In Me (Breeze Remix) | Sy & Unknown Featuring Lou Lou | 1 |
| 2007 | Reach Out | Sy & Unknown featuring Charlotte O’Leary | 1 |
| 2007 | Ultrafunkular | Sy & Unknown | 1 |
| 2008 | Just Close Your Mind | Sy & Unknown Featuring Lou Lou | 1 |
| 2008 | Maniac Psycho (Robbie Long & Stormtrooper Remix) | Sy & Unknown | 1 |
| 2008 | Let The Bass Just Boom | Sy & Unknown | 1 |
| 2008 | Fuck You | MC Storm Vs Sy & Unknown | 1 |
| 2008 | Only for You / Keep the Crowd Jumpin' 2008 | Sy & Unknown Feat Grant Paterson / Sy & Unknown | 1 |
| 2008 | Super Good (Sy & Unknown remix) / Gangsta | Dab Hands / Sy & Unknown | 1 |
| 2012 | Bright Like The Sun | Sy & Unknown feat Kirsten Joy | 1 |
| 2012 | Mambo | DJ Sy & Chris Unknown vs. Joey Riot | 1 |
| 2012 | Pictures of You (Technikore remix) | DJ Sy & Chris Unknown | 1 |
