@ 无爱の飞鱼 支线List
Walkthrough
Step 1: Complete the campaign on recruit and make the correct choices,
The first thing you want to do is complete the campaign on recruit and make the correct choices to get the missable trophies. The below includes no spoilers, so don't worry. The reason you want to dedicate a playthrough to this is because the strike force missions are very hard on veteran.
Mission 3 - During an interrogation at the end you have to resists three times by pressing

. Do not kill the person!
Mission 5 - Do not drive through the fire at the end (unlocks Hey Good Looking)
Mission 6 - Kill DeFalco at the end of the mission. If he should get away then do the "Second Chance" strike force mission instead.
Mission 7 - Do Not kill the target at the end with a headshot! Shoot him in the knee twice (unlocks Family Reunion)
Before Mission 8 - Finish the last Strike Force Mission "Dispatch". This mission unlocks after completing the other strike force missions.
Mission 8 - During the interactive cutscene you can press

or

to decide which person to kill. You need to press

and kill the soldier.
Mission 9 - During the interactive cutscene decide to shoot the captain in the leg and do not kill him.
After this you will still be missing Ultimate Sacrifice and Showdown. Rewind the story back to mission 6, but this time DeFalco has to flee. Do not play the "Second Chance" Strike Force Mission. You don't want to rescue Karma. Keep playing until the cutscene with Admiral Briggs during "Odysseus". Here you will unlock Showdown. Now go to mission select and replay mission 8. Choose to shoot Menendez to get Ultimate Sacrifice.