Colossal Cave

The achievement description says you must visit every region of the cave. I believe this includes every room in every region, however.

If so, you just need to open your map and look up any areas that lead somewhere but aren't mapped and then find your way there. Once you have all areas mapped out, get to the end of the game (by acquiring the 15th piece of treasure, then running out of actions) and the achievement should pop as soon as you wake up in the post-game warehouse.

The following is a list of every region in the game:

• Open Forest - this is where you start the game
• Upper Cave - This is the first area you visit when you enter the cave
• Hall of Mists - Directly below Upper Cave. The central area here is the Hall of the Mountain King
• Two Pit - Accessed by going West at the Bedquilt Room in Bedquilt
• Giant - Accessed by growing and climbing the beanstalk in Two Pit
• Secret Canyon - Accessed by visiting the passage at the West end of Two Pit
• Bedquilt - Accessed by going down from the hall south of the Y2 room
• Orient - Accessed by going NW in the Swiss Cheese room in Two Pit
• Troll - Accessed by proceeding forwards from the Giant's Kitchen in Giant
• Junction - Accessed by going up in Bedquilt Room
• Maze Alike - Accessed by going up the ladder after the diamond polishing station in Misty Caverns. It's where the pirate hides his treasure.
• Maze Different - Accessed by going South in Hall of Mists' Crossover Junction, then South again. Hardest area in the game.

I'm not sure about how to deal with Maze Different, however, because it has many rooms - some of which don't even appear on the map. I gave directions on how to navigate in and out because you need to go there to pop

however that doesn't include navigating all rooms in here.

It would be awesome if someone could end the game after visiting every region but not every room to let us know if that would work as well. I did finish the game once without popping this, but I wasn't really paying attention at the map, and popped it after visiting every room but not every exit in Maze Different.

This requires you to COMPLETE the game after having visited each REGION within that playthrough. You do not need to reach 350 points or visit every single room in each region. When you pull up your map, each page is a different region. They are:

Open Forest
Upper Cave
Hall of Mists
Two Pit
Giant
Secret Canyon
Bedquilt
Giant
Troll
Junction
Maze Alike
Maze Different

The only regions you don't have to enter in a complete game are "Junction" and "Maze Different." So before picking up your 15th treasure, take a little side trip and make sure you visit at least one room in each of those. It should pop as soon as you get to the final warehouse.