Changes

There are 9 levels in the TI-99/4A version of Fathom compared to the Atari 2600's 7 levels. A special message from the programmer is revealed after completing all 9 levels of the game. </ref> <ref>{{cite web|title=TI-99/4A video Game House: Fathom|url=https://www.videogamehouse.net/fathom.html}}</ref>