Minecraft has very few goals. Players can choose how they want to play. They can choose to fight bosses, such as the Wither and the Ender Dragon, or choose to explore the world and build. If the player defeats the Ender Dragon, they can see the credits of the game. Minecraft also has lots of Achievements called "advancements". These can range from simple things like sleeping in a bed for the first time, to complex things like discovering every biome in the game. Both boss fights and advancements are optional.