----------------------3.2 Game Basics (special blocks)-----------------------

Besides the normal blocks Mr Driller also contains some special blocks:

- Brown X-blocks generally have the same characteristics as the normal  
  blocks with two exceptions: First of all they need to be drilled five 
  times to be desegregated and second you lose 20 percent points of air 
  every time you destroy one by drilling. (I'll talk about air in 3.3)
  Appears in every play mode.

- White blocks completely "act" just like coloured blocks minus the ability 
  of chaining up with other white blocks. (Only appears in Mission Driller,   
  Pressure Driller and Dristone Driller)

- Crystal blocks are the most unstable blocks by far: A few seconds after 
  they appear on-screen they stop flashing announcing their implosion, 
  sometimes starting a chain-reaction with blocks situated on top of it.
  Appears in every play mode.

- Metal blocks might be regarded the complete opposite of the crystal 
  blocks as they cannot be destroyed in any way. (Only appears in Time 
  Attack)