Hologram Time Traveler is a QTE LaserDisc game created by Rick Dyer of Dragon's Lair fame. It's most notable for its very unique hologram-like display.
In between many of the game's text strings in the ROM are DOS directory listings leading to the game's C source files and build dates for said files.
0x1BE22:
c:\mt\src\attract.c Tue Jun 18 10:40:24 1991
c:\mt\src\config.c Mon Jun 17 14:45:22 1991
0x1BF4A:
c:\mt\src\chorder.c Tue Jun 04 10:27:22 1991
c:\mt\src\episode.c Mon Jun 10 12:58:11 1991
c:\mt\src\asset.c Tue Jun 04 10:53:07 1991
0x1C7BA:
c:\mt\src\input.c Thu Jun 06 18:19:03 1991
c:\mt\src\specobj.c Tue Jun 18 15:13:09 1991
c:\mt\src\window.c Tue Jun 04 12:45:28 1991
c:\mt\src\qinput.c Tue Apr 23 09:57:25 1991
c:\mt\src\action.c Tue Jun 18 15:26:03 1991
c:\mt\src\choice.c Wed Jun 12 16:02:05 1991
c:\mt\src\device.c Tue Jun 18 12:26:25 1991
0x1C972:
c:\mt\src\clock.c Wed Jun 12 15:58:06 1991
c:\mt\src\sound.c Sun Jun 09 12:33:03 1991
c:\mt\src\serial.c Mon Jun 17 11:51:09 1991
0x1CA16:
c:\mt\src\storage.c Thu Apr 25 15:57:17 1991
0x1CAE4:
c:\mt\src\pioneer.c Mon Jun 17 15:24:19 1991
0x1CC44:
c:\mt\src\display.c Wed Jun 12 09:40:15 1991
0x1CF2E:
c:\mt\src\unsolved.c Tue Jun 04 10:43:19 1991
c:\mt\src\hint.c Sun Jun 09 12:37:02 1991
0x1D072:
c:\mt\src\learn.c Wed Jun 05 09:35:13 1991
c:\mt\src\init.c Tue Jun 18 15:12:19 1991
0x1D128:
c:\mt\src\chapter.c Sun Jun 09 15:04:21 1991
c:\mt\src\branch.c Tue Jun 18 12:12:19 1991
c:\mt\src\map.c Mon Jun 10 13:04:13 1991
c:\mt\src\account.c Tue Jun 18 11:56:21 1991
Watch on YouTubeOn the laserdisc, footage exists for earning an "Orb of Slowing". From the demonstration, this seems to be a way of deliberately invoking the slowdown seen in the "Timewarp Malfunction" mode to slow the gameplay down.
In the main game, only the "Reversal Cube" is usable, which reverses play back to a given checkpoint. Because of the way the game works, the image is reflected and upside-down on the disc, to appear correct in the hologram image.
In addition, both audio channels carry a different narration to reduce the amount of disc space used.