What is it?
Debug mode is a world type which generates a world containing all block data types in all states. It is very useful for developers and resource pack creators.
It contains a total of 5274 unique block types and states. The gamemode is set to spectator by deafult. Breaking or placing blocks is impossible.
How can I enter or create this world?
On the 'create world' screen, hold ↑ Shift and left click until 'Debug mode' appears. It should be after the customised world type.
Note that debug mode is only available in 1.8 and above.
