Price For Lying Achievement
Price For Lying5
You killed Surkov for lying to you.
This and Russian Alliance are both missable achievements if you are not thorough in the game. Both achievements come depending on the choice you make at the end of the mission "Prevent Surkov's Escape". In order to even have a chance at playing this mission though, there are three requirements you must fulfill during the Moscow missions.
The first thing you must do is during the mission "Intercept Surkov at US Embassy". During this mission, after you finally meet Surkov, you will be told you must go and disable the security systems in order to leave. Following the path, after you climb up the ladder, there should be an action you can commit in this room labeled "Hack Surkov's Computer". Do that, and continue on.
Next, during you're next mission, "Contact Surkov at Moscow Office", simply talk with him. Make sure that no matter what you do, do not choose the PDA response at all during this conversation. Just keep talking to him, and about what he knows until the scene ends.
The last requirement for this achievement is during the "final" mission in Moscow, "Assault Brayko's Mansion". If you've fulfilled the last two requirements, Brayko should go on about his relationship with Surkov, and give you some more information regarding everything. Just make sure that if you plan on executing him, that you do not do so until Brayko tries to bribe you in exchange for his life and vault.
If you've done everything correctly, it'll all come down to the end of the mission. When you finally meet up Surkov, you will be given the choice between killing him, or making a deal with him. For this achievement, choose to kill him.