| 2025-11-16 20:48:43 | menace | Updated HP's membership of Limited Edition: set as ex-member |
| 2025-02-12 21:24:18 | menace | Updated HP's membership of Illusion: set as ex-member |
| 2024-04-01 22:27:23 | exocet | Added link http://artcity.bitfellas.org/index.php?a=artist&id=1101 |
| 2023-07-20 05:06:16 | menace | Added link https://amp.dascene.net/detail.php?view=3397 |
| 2023-07-20 05:05:52 | menace | Updated HP's membership of Artificial People: set as ex-member |
| 2020-08-21 12:38:59 | menace | Added credit for HP on Contactro: Graphics |
| 2020-02-23 17:46:28 | exocet | Added credit for HP on One Message: Graphics, Music |
| 2018-04-08 08:13:45 | menace | Updated visibility of real name |
| 2018-04-08 08:13:31 | menace | Set location to Conflans-Sainte-Honorine, Département des Yvelines, Île-de-France, France |
| 2018-04-08 08:13:18 | menace | Added credit for HP on Package 86: Other (pack editor) |
| 2017-03-14 17:02:28 | exocet | Added credit for HP on Mind Traveller: Graphics |
| 2014-08-30 21:05:26 | dipswitch | Added HP as a member of Heretia |
| 2014-08-30 20:56:23 | dipswitch | Added credit for HP on So!: Graphics |
| 2014-06-18 20:16:48 | menace | Added credit for HP on Showtime 3: Text (guest editor) |
| 2013-08-26 10:19:40 | dipswitch | Added credit for HP on Merry Xmas 96: Music |
| 2013-08-26 10:17:46 | dipswitch | Added credit for HP on Nude Part 4: Graphics |
| 2013-08-26 10:01:46 | dipswitch | Added credit for HP on Amiga Rules 2: Other (Support) |