From this page of the guide to Mr Prepper, you will learn how to complete the Fort Observer puzzle to get the control module for the space rocket.
The main task at Fort Observer is to get a control module that will help you build a rocket. Get to the warehouse at the end of the site. You will see the module in front of you in the form of a gray orb. Removing it will seal the door. You need to disassemble the AI module using the workshop in the right corner of the room. Now try to put the empty module in place. Of course, this will not work – you have to build a fake module.
Use parts from old computers in the warehouse:
- At the workbench,
- To the right of the workbench,
- Between barrels, to the left of the bench (at the bottom of the screen),
- Under the bed to the left.
You will find the fake module in your blueprints after disassembling the real one.