| 2025-09-15 00:57:31 | dipswitch | Added BBS The Velvet Demosite as Distsite for Halcyon |
| 2022-07-07 23:29:10 | dipswitch | Added BBS Count Zero as HQ for Halcyon |
| 2021-11-23 21:27:33 | 100bit | Added BBS CloudCity as Distsite for Halcyon |
| 2021-05-26 22:01:43 | 100bit | Added BBS Codex as Distsite for Halcyon |
| 2021-05-16 02:35:51 | dipswitch | Added BBS Timedrome as HQ for Halcyon |
| 2021-02-13 05:54:20 | dipswitch | Added BBS Mortal Dystrophy as HQ for Halcyon |
| 2021-01-25 19:34:39 | dipswitch | Added BBS The Underworld as HQ for Halcyon |
| 2021-01-24 19:12:15 | dipswitch | Added BBS A.C.E. as HQ for Halcyon |
| 2021-01-22 20:35:46 | dipswitch | Added BBS Asylum as Distsite for Halcyon |
| 2018-04-28 09:28:07 | menace | Edited notes |
| 2017-05-20 07:40:09 | menace | Edited notes |
| 2017-04-03 07:39:38 | exocet | Added Bass Cadet as a member of Halcyon |
| 2016-08-29 06:43:07 | FlashyLamer | Added Sigh as a member of Halcyon |
| 2016-08-28 08:08:23 | FlashyLamer | Added Cabby as a member of Halcyon |
| 2016-08-28 08:08:12 | FlashyLamer | Added Vorpal as a member of Halcyon |
| 2016-08-28 08:05:39 | FlashyLamer | Added Mr.Bug as a member of Halcyon |
| 2016-08-28 05:48:01 | FlashyLamer | Added Copter as a member of Halcyon |
| 2016-08-12 01:31:33 | FlashyLamer | Updated Fate's membership of Halcyon: set as ex-member |
| 2015-02-13 15:42:03 | tomaes | Added link http://www.pouet.net/groups.php?which=77 |
| 2013-05-02 06:50:12 | menace | Added link http://www.scene.org/dir.php?dir=/demos/groups/halcyon/ |