''Castle Adventure'' is an adventure game created in 1984 by Kevin Bales for the MS-DOS operating system. The game was originally compiled from the BASIC programming language.

The game's plot is simple: you, the adventurer, are trapped in a deserted castle and must seek a way to escape.

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!! ''Castle Adventure'' contains examples of the following tropes:

* BoobyTrap: The path from the dungeon has several of these that drown the adventurer. Having and wearing the necklace, which grants protection from traps, puts a stop to it. Just don't go back there later after ditching the necklace...
* {{Cap}}: The maximum score is 1550, obtained by getting all of the treasures and items, killing all of the monsters (a handful, though not many), and escaping the castle.
* ExcusePlot: The player is stuck in a deserted castle and must look around for clues as to how to escape, collecting treasure along the way.
* GameBreakingBug: The game comes with a Save feature, but utilizing it can cause the castle to glitch up upon reloading. Beating the entire game in one go is the suggested course of action.
* GuideDangIt: It is not entirely obvious where one of the treasures, the large gem, is located. This is one of the things most likely to prevent the player from obtaining a perfect score.
* HealingPotion: A fountain found early on provides the means of restoring the adventurer's unseen health throughout the game, though a flask is required to collect and drink the water.
* InventoryManagementPuzzle: You can only carry up to seven items at a time. Two such items are likely to be the sword and the helmet (the latter for defense), limiting the player in how many useful items and treasures they can carry. Leaving the items in the courtyard at the start of the game is likely to be the go-to solution.
* NPCRoadblock: Two rooms are blocked off by these, one by a vampire and the other by a fairy. The former won't budge without the cross, while the latter only leaves after the adventurer plays music for it.
* SecretRoom: Several of these, both of which require the magic wand in order to access.

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