is a little known game called dungeon master by FTL, You are in a dungeon and you have to requite hereos train then up by gaining skill levels learning new spells and so on. The game was released in 1987 and I think it is by far the best game ever!!!
I have completed it about 5 times, and it takes roughly 15 hours to complete

You can download it from
here. Below are some screenshots.
