| 2020-01-03 02:09:00 | gasman | Updated visibility of real name |
| 2019-12-24 21:16:31 | ltk_tscc | Updated Gary Johnson's membership of Atari Corp.: changed member to Gary Johnson, set as ex-member |
| 2019-12-24 21:08:39 | ltk_tscc | Added credit for Gary Johnson on Missile Command: Graphics |
| 2019-12-24 20:52:10 | ltk_tscc | Set location to United States |
| 2019-12-24 20:52:05 | ltk_tscc | Added Gary Johnson as a member of Atari Corp. |
| 2019-12-24 20:51:18 | ltk_tscc | Added link http://www.mobygames.com/developer/sheet/view/developerId,7152/ |
| 2019-12-24 20:49:16 | ltk_tscc | Set real name |
| 2014-09-21 21:15:10 | ltk_tscc | Added credit for Gary Johnson on Catnap Demo: Graphics |