The following are all unused radio messages removed from the Operations level of BioShock 2's downloadable content, Minerva's Den.

MDA_R_Port_Motivation[]
01. C.M. Porter - The Thinker[]
It's loss that brought me to Rapture... the loss of my wife, Pearl... all because of another man's war. The Thinker is all I've got now, and its programming is the blueprint. Dr. Tenenbaum understands. With the machine code in hand, she and I can return to the surface... and I can continue my life's work.
02. C.M. Porter - A Thinking Computer[]
I dreamed of a computer that could think for itself... and using Rapture's technology, I made that dream reality. The Thinker tackles abstract problems, analyzes them, and forms its own conclusions. New, genuine thought... up out of the machine. I can't leave it here to rot in Rapture. You and me... we're giving The Thinker a new lease on life.
MDA_R_Port_VoltWarnin[]
01. C.M. Porter - Be Careful![]
It'd pay to be more careful around that much voltage.
MDA_R_Reed_TauntCode[]
01. Reed Wahl - Congratulations[]
Congratulations, Sigma. You have proven your ability to count.
MDA_R_Port_UnfloodDir[]
01. C.M. Porter - Get the Water Out[]
That son of a bitch, Wahl. He flooded the clean chamber leading to Mainframe Access. If you can get the ventilation systems up and running, it should siphon the water back out.
MDA_R_Port_Unfreeze[]
01. C.M. Porter - Leaking Coolant[]
Coolant must've sprung a leak... the controls for Turbine A are frozen solid.
02. C.M. Porter - Thaw the Ice[]
Climate Control is on ice until you get that console thawed out.
03. C.M. Porter - Melt the Ice[]
Find some way to melt the ice on the turbine control panel or else we'll never get out of Rapture.
04. C.M. Porter - Breaker Switch is on Top[]
The Power Supply Coil is standing by. There should be a breaker switch all the way up top...