Deal With The Deceiver

The Deal With The Deceiver is one of the Achievements in The Talos Principle.

How To Get The Achievement
To get the achievement you have to change your beliefs and agree with MLA in conversation that starts with "There you are. You kept me waiting. I finally put my finger on what was bothering me." Next time you get to talk to him he will try to strike a deal - agree again.

Welcome to the dark side.