This video shows how to complete all mission objectives on a single play-through, although the 100% completions are cumulative and the Gold Medal can be achieved on multiple play-throughs. Mission N. 79 - The Big Score (Obvious Approach). Characters: Michael, Trevor and Franklin. Given by: Lester / Heist. Gold Medal Objectives:. ● Headshots - Kill 20 enemies with a headshot. ● Time - Complete within 16:00. ● Cha-Ching - Drop the gold onto the train within 30 seconds. ● Accuracy - Finish with a shooting accuracy of at least 60%. Related Achievements \ Trophies:. ● The Big One. - This ain't no dream no more. |--| ● Solid Gold, Baby. - Earn 70 Gold Medals on Missions and Strangers and Freaks. Video recorded on: PC with all settings maxed out. GTA Series Videos is a dedicated fan-channel keeping you up to date with all the latest news, video walkthroughs and official trailers of the most successful video games published by Rockstar Games, including Grand Theft Auto series, Red Dead Redemption, Max Payne, L.A. Noire, Bully and many others. |--| This channel is in no way tied to Rockstar Games or Take-Two Interactive. Follow GTA Series Videos on:. || YouTube -.