Hero's Quest: So You Want To Be A Hero (1989)

The game advertised itself as "three games in one" since it was the first Sierra game that (according to RPG customs) allowed the selection of a character out of three classes: Fighter, Magic User, and Thief.

What class the hero assigns to a character largely determines how they can solve puzzles and what quests they will run into. However, the distinction between classes was not an absolute one; players could add skills to a character and allow them to complete quests related to other classes in this game and others in the series.

Quest for Glory introduced a realism rarely found in RPGs and other adventure games even today. Day, night and the passage of time was a factor; the setting and scenery was different during day and night. The main character had to eat on a regular basis, he would become tired from running and fighting which required rest and sleep. Skills were not obtained by gaining levels through combat, but rather increased distinctly through the regular course of your adventuring. The more the player used magic, the more the Hero's Magic ability would increase (followed by Intelligence); likewise the more the player engaged in battle, training, or even cleaning the baron's stables, the more the Hero's Strength, Vitality and Agility would increase.

This is one of the few Sierra adventure games where the player character has few or no speaking lines; although the player can input commands such as "ask about brigands", the player character has almost no dialogue.