Heroes are Born Achievement in Assassin's Creed III

Story related, can't be missed.

Mission 1: Hide and Seek
Objectives:

• Find all the children without making a mistake
• Find all the children within the given time (4:00 Minutes)

Mission 2: Feathers and Trees
Objectives:

• Do not touch the ground or water
• Collect three feathers

Mission 3: Hunting Lessons
Objectives:

• Combine bait and snare to catch an animal (3)
• Hunt more than one type of animal
• Air assassinate animals (2)

Mission 4: Something to Remember
Objectives:

• Avoid mid-air collisions