Gworb

Gworb is the character that appears in the Alien Autopsy and is unlocked in a hidden mission in Surgeon Simulator 2013. He is the second character to have replaced Bob in a surgery, with the first being The Heavy from Team Fortress 2. Gworb needs 6 surgeries done instead of Bob's usual 5 and the Heavy's 1, each representing a famous YouTuber:
 * The Pewdsball - Named after PewDiePie
 * The Birgirspallex - Named after BirgirPall
 * The Cubed Trangrifier - Named after OfficialNerdCubed.
 * The Gavichal - Named after Gavin Free and Michael Jones of Rooster Teeth's Achievement Hunter. If you touch its spikes, you can see the world as Gavin Free sees it.
 * The Robbaloraz - Named after Robbaz.

The name Gworb originates from Rooster Teeth's Achievement Hunter's very own "Let's Play - Surgeon Simulator 2013: Alien Transplant with Michael Jones and Gavin Free" where, on January 31, 2014, they play their one year anniversary of Surgeon Simulator. The new video includes the alien transplants, which they decide to name Gworb, thus creating a name for an alien in much need of transplants.

Trivia

 * Gworb's name is now canon, and as of Surgeon Simulator Touch, he has officially been named Gworb.
 * However, for some reason, the man telling you to transplant Gworb refers to them as "Dorothy".