| 1987 | Overkill are formed after the break up of The Lubricunts |
| 1981 | Dan Split leaves band, joins Anthrax |
| Rich Conte joins the band | |
| First originals writen: Grave Robbers, Overkill, Unleash the Beast within and Death Rider | |
| 1982 | Rotten to the core writen |
| Rich Conte leaves. | |
| Feb 1985 | Feel the Fire album released |
| Apr 1987 | Taking Over album released |
| Oct 1987 | Fuck you EP released |
| June 1988 | Under the Influence album released |
| Oct 1989 | The Years of Decay album released |
| Bobby Gustafson leaves band, joins Cycle Sluts from Hell | |
| See what Bobby is doing now! | |
| Merritt Gant recruited from Faith or Fear | |
| Rob Cannavino joins from Ram Rod | |
| Sept 1991 | Horrorscope album released |
| Sid Falck leaves the band, unknown what he's doing now. | |
| Tim Mallare recruited from M.O.D. | |
| May 1993 | I Heard Black released |
| 1994 | WFO released |
| 1995 | Wrecking Your Neck Live released |
| Merritt Gant and Rob Cannavino leaves | |
| Joe Comeau joins from Leige Lord | |
| Sebastian Marino joins from Anvil | |
| 1996 | The Killing Kind album released |
| 1996 | Fuck you and then some album released |
| 1997 | From the Underground and below album released |
| 1999 | Necroshine album released |
| Dave Linsk joins from Anger on Anger to replace Sebastian Marino | |
| Coverkill album released | |
| 2000 | Bloodletting released |
| 2001 | Derek Tailer joins from S.M.F, Joe Comeau leaves to join Annihilator |
| 17/1/2002 | Officially sign to Spitfire Records |
| 23/3/2002 | Record a new live album and dvd at the Paramount Theatre in Asbury Park, New Jersey. They play for over two hours and perform a lot of material that hasn't been played live for years. |
| 18/6/2002 | Wrecking Everything Live released |
| 27/6/2002 | B.B. has a mild stroke whilst on stage in Nurnberg, Germany. |
| 19/11/2002 | DVD released. |
| 24/3/2003 | Killbox 13 released in Europe |
| 25/3/2003 | Killbox 13 released in the US |