| 2016-04-19 13:45:38 | TheCollector | Set release date to January 1991 |
| 2015-04-10 15:08:50 | ltk_tscc | Added link http://www.atarimania.com/demo-atari-st-impact-mega-sound-demo_26695.html |
| 2014-10-24 21:06:35 | ltk_tscc | Added link http://www.pouet.net/prod.php?which=60229 |
| 2014-10-24 21:06:29 | ltk_tscc | Added link ftp://ftp.untergrund.net/users/ltk_tscc/fujiology/I/IMPACT/MEGA_SND.ZIP |
| 2013-05-29 12:41:05 | ltk_tscc | Updated Helrizer's credit on Impact Mega Sound Demo: Graphics |
| 2013-05-29 12:40:40 | ltk_tscc | Added credit for Hellrizer on Impact Mega Sound Demo: Graphics |
| 2013-05-29 12:40:28 | ltk_tscc | Added credit for Axiom on Impact Mega Sound Demo: Code |
| 2013-05-29 12:40:19 | ltk_tscc | Added 3 screenshots |
| 2013-05-29 12:40:09 | ltk_tscc | Added production 'Impact Mega Sound Demo' |