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- "What is driving you into the Core, Sigma? What COMPELS you to defy The Thinker's equation?"
- ―Reed Wahl[src]
The Thinker is the third and last level of BioShock 2's downloadable content Minerva's Den. It is here that Subject Sigma reaches The Thinker's Computer Core in order to print out a copy of the machine's code, and finally confront Reed Wahl.
- Main article: Minerva's Den
As Sigma arrives, Reed Wahl shuts down the door to the Mainframe Computer Core room, forcing him to detour through the Mainframe Access Shafts while Wahl sets several security devices to hinder his progress. He finally reaches a room where his opponent has been madly writing down equations to find out what secret links together Subject Sigma, Charles Milton Porter and The Thinker. In the middle of his scribblings lies an audio diary Porter recorded before his disappearance from Minerva's Den, in which he starts running a new protocol for The Thinker to calculate a way to escape Rapture for itself. In the Computer Core, Porter urges Sigma to go to the console upstairs to confirm his genetic identity and start the printing process of the code, but Wahl shuts down the machine to keep it from interfering in his confrontation with Sigma. Brigid Tenenbaum finally enters in contact with Sigma and warns him that shutting down The Thinker puts in jeopardy the very state of Minerva's Den, which means he will have to defeat Wahl, take his Administrator Punchcard and restart the computer before it is too late. Helped by several reprogrammed Alpha Series, Wahl engages the fight with his mortal foe before being finally defeated.
Sigma then recovers the punchcard and launch back The Thinker, which proceeds in confirming his genetic identity as Alpha Series, and his former one as Charles Milton Porter. Porter's voice is heard once more on the radio, greetings Sigma upon the recovery of his identity, before fading and revealing that it was no more than The Thinker itself running a personality duplication protocol based on its creator. Tenenbaum tells Porter that both the machine and her needed a familiar, comforting voice to guide him through his journey, eventually using his own. She then says that thanks to the machine's code, she will be able to bring him back to normal. She asks Porter to meet her in his private docking station behind his private office near the Computer Core, where a Bathysphere awaits for their escape from Rapture. In his former apartments, souvenirs of his life on the surface with his deceased wife Porter fill in the blanks in his memory. Tenenbaum is sitting inside the submersible, waiting for Porter to pull the lever and return to the surface.
After returning to the surface, Porter rebuilds The Thinker from the printed code, which is then able to process the correct genetic combinations for Tenenbaum's cure to ADAM sickness. She keeps her promise and reverts Porter back to human, who then visits his wife's grave. He leaves a letter to her, finally accepting her death and relieved of his grieving.
- 1 Sea Slug
New Gene TonicEdit
- Main article: Radio Messages: The Thinker
- Upon first entering the level, if you stand within the open airlock door, the Brute Splicer cannot figure how to reach you even after he just saw you (like to fire at him).
|Mainframe||The Thinker (Computer) · Apartment of Charles Milton Porter|