Here is the full list of all 24 Colossal Cave achievements.
You enter the wellhouse.
You open the grate and enter colossal cave.
You successfully capture the bird
You successfully defeat the snake in Hall of Mists
You have an encounter with a dwarf.
Allow the bear to walk on the bridge
You see the the breathtaking view in the depths of the cave.
Player discovers 5 treasures
Fall and break every bone in your body.
You build a Crystal Bridge
Congratulations. You've just vanquished a dragon.
You encounter the pirate, and recover your stolen treasure.
Player discovers 10 treasures
You retrieve eggs from troll
You have freed the bear and brought him to the troll.
You learn all the magic phrases.
Get batteries from the vending machine in maze
Grow the beanstalk, climb and explore the Giant Area
You see the shadowy figure reflected in the cave.
Safely deposit the vase in WellHouse
You explore every region of the cave
You discover all 15 treasures
You have cleared the game!
Perfect 350pt score.