CAT is an old program, now defunct and no longer supported.
Text Adventure Games written with CAT:
Feeding Time by Doreen Bardon Text. A quest to feed your neighbours cat in this feline romp. (1.4mb)
Fabled Treasure of Koosar by Doreen Bardon. Text. A strange book leads to an unusual and mysterious quest. (1.5mb)
Great Great Grandfather's Gold by Frank Fridd. Text. A faded letter sparks a quest for buried treasure. (1.6mb)
The Crystal Keepers by Doreen Bardon. Text. Recover the stolen artifacts belonging to the five good fairy keepers of the Crystal Caverns in this magical and enchanting tale. (1.2mb)
Smuggler by Frank Fridd. Text/Gfx/Sfx. Travel back to 18th Century England to save Earth in this historically authentic smuggling quest. Play with gfx and/or sfx or text only. (2.06mb)
Even The Devil Must Die by Mark Hancox. Text. Death PLC sends you to assassinate the devil. (1.2mb)
Shield Of Destiny by George Rawson. Text. Rescue a princess in this enchanting quest. (1.1mb)
Four Dragons by Patrick Paglen. Text. Discover the secrets of a mystical alchemist. (1.2mb)
Sands of Egypt by Ambrosine. Text. Explore a strange pyramid and discover treasure and artifacts. (1.3mb)
Warriors of the Ssorc by Tim Gibson. Text/Gfx/Sfx. Biblical quest. Required Password is: "suffering" (5.99mb)
CAT and these games are not guaranteed to run correctly or load on all OS.
I can run these with CAT and load the gamefiles into the CAT Editor so I can get any text lists of data necessary from inside CAT if you need them... I don't think you could convert from just the .cdb file alone.
But you may find it a whole lot easier to instead create your new game idea - it sounds quite interesting.
You cannot post games onto the forum so you need a free website that allows you to upload files - or why not upload it to one of those free file-sharing sites and post the link?
You could make a youtube demo of your game also.
The command "cdown" just moved the text cursor down to the next line - a bit like a <return> code (carriage return) or newline action.
Phil.