| 2022-12-23 06:16:41 | menace | Added credit for 20th Century Composers on C64 Memories Vol. IV: Music |
| 2022-10-16 11:35:30 | ericorsio | Added BBS Divine Ultimatum as HQ for 20th Century Composers |
| 2021-12-25 13:15:16 | Anxious | Added credit for 20th Century Composers on Freeze: Music |
| 2021-12-25 12:56:48 | Anxious | Added credit for 20th Century Composers on Get Joined: Music |
| 2020-04-18 09:27:22 | menace | Added credit for 20th Century Composers on Bergen Party 90!: Music |
| 2019-04-14 18:27:30 | menace | Updated 20th Century Composers's credit on FLIgraph V2.2: Music (intro) |
| 2019-04-14 18:27:24 | menace | Added credit for 20th Century Composers on FLIgraph V2.2: Music |
| 2019-01-18 05:14:46 | menace | Added credit for 20th Century Composers on 12 O' Clock - The Jewel Version: Music |
| 2018-07-04 06:31:44 | menace | Edited notes |
| 2018-07-04 06:30:51 | menace | Edited notes |
| 2018-07-04 06:30:32 | menace | Added 20th Century Composers as a subgroup of AMOK |
| 2018-07-04 06:30:12 | menace | Edited notes |
| 2018-06-24 06:38:49 | menace | Added credit for 20th Century Composers on Future Composer V3.1: Music |
| 2018-06-13 18:23:08 | ltk_tscc | Added link http://csdb.dk/group/?id=626 |
| 2018-06-13 18:22:49 | ltk_tscc | Added link https://www.pouet.net/groups.php?which=5764 |
| 2017-07-30 07:02:08 | menace | Added credit for 20th Century Composers on Ace 2088: Music |
| 2017-06-07 14:34:23 | menace | Added credit for 20th Century Composers on Cartotech V8.0: Music (intro) |
| 2017-06-07 13:26:31 | menace | Updated 20th Century Composers's credit on Cartotech V7.0: Music (intro) |
| 2017-06-07 13:26:25 | menace | Added credit for 20th Century Composers on Cartotech V7.0: Music |
| 2017-06-07 07:35:47 | menace | Added credit for 20th Century Composers on Pulstar: Music (intro) |
| 2017-06-05 07:55:03 | menace | Added credit for 20th Century Composers on Happy End: Music (intro) |
| 2016-09-25 09:34:03 | menace | Added credit for 20th Century Composers on Internation 3D Tennis: Music |
| 2016-09-09 08:48:44 | menace | Added credit for 20th Century Composers on Monty Python's Flying Circus +2: Music |
| 2012-06-26 06:11:23 | menace | Edited notes |
| 2012-06-26 06:11:09 | menace | Edited notes |
| 2012-06-26 06:10:23 | menace | Edited notes |