Minecraft is a sandbox game which allows players to build constructions out of textured cubes in a 3D world.
That is such a simple description for a person who can't get enough!
I LOVE the idea of houses with hidden rooms, magic levers, and hidey holes. I LOVE looking at floor plans, designing with floor plans, and dreaming up impossible futures. I LOVE the ideas of spelunking and tunneling (B is claustrophobic, so that's not going to happen.)
And then comes Minecraft. For all the men out there who like to fight and need a big challenge there are spiders, zombies, skeletons, and creepers to battle against. You also have to find some important survival tools (coal, food, shelter). But for all the big thinkers the crafting possibilities are endless. There are caves to explore, dungeons with hidden items, things to make (glass, clay/brick, boats, etc.), and homes to build.
It is all of my dreams come true. :) I LOVE Minecraft.
The guy (Markus Persson) who made this game has become overloaded with the interest in the game that his site crashed last weekend. If you're looking for cool modern graphics, then this isn't the game for you. But I bet you'd be surprised how addicting it could be.
Check out the main site here.
Or these videos here, here, and here.
Oh, and here's an article here.