The Nicholson Electroplating Add-on for L.A. Noire (Xbox 360) has 5 achievements worth 100 gamerscore.
Complete 'Nicholson Electroplating'.
Find and inspect the prop spinner at the Nicholson blast site.
Find and inspect all clues inside Okamoto's ransacked apartment.
Kill the drivers of two of the MP vehicles in the Hughes Aircraft gun battle before they pull up.
Pursue Vernon Mapes from the burning house to Hughes Aircraft on your first attempt.