Castle Adventure is a freeware adventure game designed by Kevin Bales and released in 1984. It was also illegally included in Keypunch's Swords and Sorcery under the title Golden Wombat. It is compiled from Microsoft BASIC. The source code has never been released.

The player interacts with the environment through a mix of keyboard controls and a text parser. Items visible on the screen can be picked up by guiding the adventurer over them. For items not on the screen, the player needs to type commands such as: get diamond.

In order to defeat and defend against monsters, the adventurer must possess a sword. Fighting in Castle Adventure consists of directing the adventurer into a monster. Though it is not visibly recorded, combatants can sustain only a finite amount of damage, after which either the monster or the adventurer dies (as appropriate).

To complete the game, the adventurer must open a gate in the room from which the game begins, freeing themselves from the castle.