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That's the great things about Minecraft. Aside from being able to build some awesome shit, you also can walk away with some great stories.
I haven't played very much of the game, but I did sit down with it for a few hours recently and it is amazing how easy it is to get wrapped up into the game. It can be both peaceful and nerve-racking. It's like survival-horror with an emphasis on the survival.
For example, I have a little house built into the side of a mountain that I have been working on. I was working on my basement and was just totally engrossed in making the place look nice. I was carving out a long thin hallway when all of the sudden I just dropped down a shaft. I didn't have any torches to light the way, even though I had a bunch of other tools and materials on me. I didn't even know where I fell from. I was far down and couldn't see up to where I had been. The shaft kind of opened up at the bottom into some caverns. My character was injured and with some of the monsterous noises I could hear, I wasn't sure I would get out alive. Eventually, I was able to carve some make shift stairs that went up the sides of the shaft and found my way back to the sanctuary of my basement. Who'd have thought that remodeling the basement would have turned into a harrowing near death experience?
It's just little things like this that make Minecraft such an amazing game though. You can get really involved in your own little insular fortress, but then you suddenly crack open something and this whole other gigantic area of the world opens up... and it's often full of danger. Minecraft feels more vast than any game before it. I'm really loving this game right now.