Never received the bureau heist please help

#1diamondcutrPosted 1/24/2014 9:50:22 AM
Hey fellow gamers. I have really been enjoying gtav but I am getting near the end and I think I missed the bureau raid heist. I am currently at the big one heist prep mission but am reading everywhere that its the final heist. Is it possible to do the bureau raid after the big one? I read on the walkthrough on IGN that the mission architect's plans unlocks the bureau raid but I never received this mission. Who gives you the mission architect's plans? The only thing I can think of is that I didn't complete lester assassination missions for franklin yet, do these pave the way for the bureau heist? Any help would be great thanks.
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Yeah Dawg