The Casting of Frank Stone

Easiest and fastest way to get this would be:

- Stick to the script when you first start playing as Jaime. That means both ripping the restraint off and selecting the Defiant option.
- Side with Chris when having to choose between her argument or Linda's.
- When talking about the Frank Stone case in Jaime's garage, make sure to select the Suspicious option as the other will cause a negative reaction to Chris.
- Go to the drugstore first instead of the curiosity store. Pick the Encouraging option when telling Jaime to haggle with the clerk.
- When you go to the curiosity store, have Chris agree with Jaime about not trying to steal.
- While waiting for Chris and Robert to come to Jaime's garage, select the Excited option as the other will cause negative points.
- When talking to Linda in Jaime's garage right before heading to the steel mill, DON'T pick the Insecure option. This is probably the most important choice towards this achievement as it prevents a massive boost later.
- Lastly after leaving Frank Stone's lair and seeing Chris took the hand in a jar, select the Shocked option as the other gives negative points. Picking the Appreciative option after this should be the boost that gets you the achievement as it solidifies their relationship. NOTE: If you picked the Insecure option when talking to Linda in the garage, you will not have the Appreciative option as Chris will instead call out that she thinks you have feeling for Linda after you show you're insecure about Robert.

If you somehow don't get the achievement after this, it's alright. Since you went to the drugstore over the curiosity store first, Jaime will have the firecrackers that he can use to survive Frank when you select Confront instead of Flee. This prevents the massive negative points you get for Chris seeing Jaime flee. Then just make sure you send Chris back to 1980 and when she reunites with Jaime, she won't try to punch him and this reunion should trigger the achievement.