| 2025-08-28 01:12:38 | dipswitch | Added credit for Harlequin on Daskmig 8: Text |
| 2025-06-09 20:34:07 | dipswitch | Added credit for Harlequin on Cheese #02: Text |
| 2025-04-10 02:13:33 | psenough | Added credit for Harlequin on Mystery Demoscene Theater 9000 s01e07: Other |
| 2024-03-25 01:52:01 | psenough | Added credit for Harlequin on Mirage #010: Music |
| 2024-03-25 01:01:23 | psenough | Added credit for Harlequin on Uit je Dak: Music |
| 2024-03-25 00:56:12 | psenough | Added credit for Harlequin on Mirage #008: Music |
| 2024-01-25 13:14:31 | psenough | Added Harlequin as a member of Sonical Dreams |
| 2023-05-05 02:40:13 | psenough | Edited notes |
| 2021-12-10 23:38:12 | dipswitch | Edited notes |
| 2021-02-28 11:54:45 | 100bit | Added credit for Harlequin on Thirty: Text |
| 2021-02-27 22:43:18 | Brittle | Added Harlequin as a member of Focus |
| 2020-10-26 12:23:39 | cba | Added credit for Harlequin on Retro-Lamers: Graphics, Music |
| 2019-12-08 07:01:12 | menace | Edited notes |
| 2019-10-19 06:18:22 | menace | Added credit for Harlequin on Scenial 4: Other (official spreader) |
| 2019-06-21 16:54:49 | 100bit | Added credit for Harlequin on Multi Mega Coop Demo: Graphics (+charset), Text |
| 2019-06-20 19:42:30 | 100bit | Added credit for Harlequin on Megazine February: Text |
| 2019-05-23 18:32:27 | exocet | Added credit for Harlequin on X'95 Invitation: Graphics, Music |
| 2019-04-14 05:01:26 | menace | Added credit for Harlequin on Have Gun, Will Travel: Graphics, Music |
| 2018-03-09 14:03:26 | exocet | Added credit for Harlequin on Black Ice: Graphics, Music |
| 2018-02-02 14:44:16 | menace | Added link http://artcity.bitfellas.org/index.php?a=artist&id=1879 |
| 2018-01-29 17:51:56 | 100bit | Added credit for Harlequin on C6-IntroCompo2014: Music |
| 2016-10-22 11:41:32 | exocet | Added credit for Harlequin on New World Order issue #7: Music |
| 2016-09-07 03:52:41 | menace | Set real name |
| 2016-08-06 14:53:04 | sensenstahl | Added credit for Harlequin on Kaoz Landz: Music, Graphics |
| 2015-11-27 23:11:18 | exocet | Updated Harlequin's credit on Smegma: Music, Graphics |
| 2015-09-10 09:50:08 | menace | Set location to Gemeente Amsterdam, North Holland, Netherlands |
| 2015-09-10 09:41:22 | menace | Added credit for Harlequin on Spintro: Graphics, Music |
| 2014-03-23 01:12:16 | dipswitch | Added credit for Harlequin on Insight 1: Other (Interviewed) |
| 2014-03-23 01:11:54 | dipswitch | Added Harlequin as a member of Silicon Limited |
| 2013-05-04 01:41:12 | dipswitch | Added link http://noname.c64.org/csdb/scener/?id=3934 |
| 2012-08-01 13:17:10 | langhuxley | Added credit for Harlequin on Cheese #09: Music |
| 2012-07-31 14:08:25 | langhuxley | Added credit for Harlequin on Puker: Graphics |
| 2012-07-31 14:08:08 | langhuxley | Added credit for Harlequin on Puker: Music |
| 2012-07-24 05:46:48 | menace | Added credit for Harlequin on Smegma: Other |