Marathon

The source code appears to have gone missing and the executable
does not appear to have any symbols.

Level Select

Holding the Command and Option keys together while clicking on the
"Begin New Game" button brings up a prompt to go to any level in the game.
This also works for doing either a single-player or a network game.

Developer Message

Co-programmer Jason Jones inserted a message in Marathon's resource fork,
giving some advice to would-be hackers and programmers, as TEXT ID 128:

     Hey you, looking through my resource fork:

     Because of time constraints, many of the interesting parts
     of Marathon (i.e., the texts, the chapter screens, etc.) were
     not encrypted like I've done in the past with Minotaur or
     Pathways.  This also makes globalization easier.

     So when you read all the computer terminals from ResEdit
     or find out what the final screen looks like, don't post 
     on comp.sys.mac.games or AOL or whereever you call home
     on the information toll-road and ruin things for everyone
     else.  Go find it in the game, and tell people how to get
     themselves there.

     I'd also like to say that Greg and I have only slept for 15
     hours in the last seven days.  <grin>

     I hope you guys are already working on level editors and
     figuring out the format of the "Physics Model" file!
     Competent programmers serious about doing any sort 
     of add-ons to Marathon should e-mail me on the internet
     at jon3@quads.uchicago.edu for help and (maybe) header
     files.

     Thanks,
     Jason (Dec. 18, 1994 1:57am.)

     PS.  In case you were wondering, you can't ever find the
     pirated copy of Copland in Marathon.  That item used to be
     a weapon that we took out late in development (the copy of
     Windows NT was it's ammunition) but that will find it's
     way into the Network Upgrade for Marathon.