Scientific Pursuits is a main quest in Fallout 3 and is also an achievement/trophy.
Three Dog informed the Lone Wanderer that their father had headed to Rivet City to speak for a certain Madison Li. She would be the best lead to finally find him.
- Travel to Rivet City and enter its science lab.
- Talk to Dr. Madison Li.
- Go to the Jefferson Memorial and find Dad's holotapes.
- Travel to Vault 112 within Smith Casey's garage and enter the Tranquility Lane lounger.
|10|| ||Gain entrance to Rivet City.|
|20|| ||Talk to Doctor Li about Dad and Project Purity.|
|30|| ||Look for Dad in Project Purity's Control Room.|
|40|| ||Search Dad's holotapes for clues to his location.|
|50|| ||Listen to Dad's personal journal entry 10.|
|60|| ||Gain access to Vault 112.|
|65|| ||Put on a Vault 112 suit.|
|70||Sit in the unoccupied Tranquility Lounger.|
- Smith Casey's garage can be accessed straight after the player leaves Vault 101, therefore advancing through a large section of the game's main quest-line.