Links

welovedosgames.net - Castle Adventure on We Love DOS Games.
shikadi.net/moddingwiki/Castle_Adventure - Info of the game's files with viewer program and source.
mobygames.com/game/dos/castle-adventure - Moby Games.
en.wikipedia.org/wiki/Castle_Adventure - Wikipedia entry.
vgmpf.com - The game in Videogame Game Music Preservation Foundation.
homeoftheunderdogs.net/game.php?id=3953 - The Underdog's review.
seed7.sourceforge.net/scrshots/castle.htm - Clone game for modern platforms.

Use the image below for linking.