1. First , you need to go to the second floor of Chaolu Mansion , specifically the room on the right.
2. Next , climb up the right wall and turn left to enter the area of the Hanu Brothers Machine .
3. When the battle starts , use the rocket launcher to attack the first enemy, then go to the room on the right.
4. The key point is to fire the first rocket launcher to destroy the two walls and create a channel for subsequent actions.
5. Finally , successfully kill the three enemies in the two areas that appear, and you will have completed the achievement of Full Fire and Home Alone .
Through the above steps, I believe you will easily unlock this achievement in "Collapsed Star Railroad" and enjoy more fun brought by the game! Remember to use strategies flexibly to experience every exciting detail of the game.