Complete "The Gates of El Presidio".

Complete 20 story missions without switching to a new horse at a hitching post.

Kill an helicopter's pilot with any weapon.

Kill 12 enemies without getting detected.

Unlock all trophies

See Johann's name in the ending credits

Look in all peepholes and telescopes long enough to hear Edith's commentary

Take a picture of the rabbit outside Odin Finch National Park

Let the drunken sailor finish his song

Take both paths to the house

Completed Batman: The Enemy Within

Completed Chapter 4 of Episode 5