Fallout 4 – Reunions Walkthrough

Dogmeat will use his scent to hunt down Kellogg one clue at a time. Follow him.

When Dogmeat stops for the first time, at a pond, look for a cigar in the immediate area. Continue following Dogmeat.

After Dogmeat stops again, look for a bloody rag at a freeway underpass. Continue following Dogmeat.

After Dogmeat stops again, at a railroad shack, find another cigar there.

 Find the remains of a robotic Assaultron and talk to it. (See Fallout 4: Getting a Clue Walkthrough)

Once you reach Fort Hagen, Dogmeat will lead you to another bloody rag for you to analyze.

You can enter the Fort by either going through an underground parking lot or through a hatch on the roof. Be prepared for challenges ahead. (See Fallout 4 – Prologue Walkthrough)

Follow the main path to reach Kellogg. After talking, be prepared to fight him.

Loot Kellogg’s for his terminal password and his Cybernetic Brain Augmenter. Use the nearby terminal to open the security doors.

Return to Diamond City and talk to Piper at either her office or at the Valentine Detective Agency.