The following video shows the achievement unlocking early in the game. The video starts with Adam going into the yard.
--Talk to Fixer (result of the conversation with Flossy that occurs automatically thru story progression)
--Find Fixer in a fenced-in area of the yard and talk to him
--Search Fixer's room, Room A309
(result of conversation with Fixer if you chose to talk to him)
--When searching Fixer's room, open Teddy Bear to find note with comment about the Showers
--Go to the showers and open the Teddy Bear in a laundry basket to find 6014
written on a scrap of paper
--6014 is the code to the locked door of the laundry room, up the stairs from the shower and to the left.
--Open the laundry room to find a basketball (and an altered biocell in a Teddy Bear)
--Take the basketball to the court right next where you talked to Flossy
--Aim the basketball and shoot by pressing
to unlock the achievement.Notes on the basketball shooting techniques used in the video
Adam has good range so he stands behind the center line
Adam aims at the backboard so the bounce will cause the ball to go into the basket
Note that you can make a save right after you acquire the altered Biocell. You can then consume the Biocell to unlock the following achievement. Since consuming the Biocell prevents you from unlocking another achievement, you can reload the game you save and continue on with the Biocell intact: