Dragon Slayer © 198? Honeysoft.
The Kings daughter is being held captive by an evil dragon in a deep cave. You, Sir Knight, must journey to this cave, slay the dragon, and return the princess safely to the palace, whereupon you will be richly rewarded and gain her hand in marriage. There are many perils to survive along the way, plus treasures to be collected. You would do well to heed the numerous clues left by those who ventured this way before, as many have previously tried and failed.
Honeysoft Software Cattledog 1986.