Is there a campaign in Minecraft?

Answer 1

Of a sort. Assuming you have structure generation on, there will be "strongholds" scattered throughout the map. If you explore one of these, you will eventually find a portal to the End. (Activation requires a number of an item crafted from a Nether specific material plus loot from what's probably the most difficult Overworld mob to fight.) Once there, you will face the almighty Enderdragon. Bring many arrows and healing stuff. And notice the healing crystals that need to be smashed. And the fact that the mighty Enderdragon smashes through all blocks not native to the End, including breaking the ladders you built to reach the healing crystals. I've never even found a stronghold, but YouTube videos indicate that this is a battle of epic proportions. After defeating the Enderdragon, you can return to the Overworld and turn the End into a giant Enderman based XP grinder, to which you have secure access. (You did clear out that stronghold before attacking the dragon, right?)