The Russian machineis not the only reason why you visit this cave once again.
It is shown on the above screenshot.
It it’s so, leave the cave, enter the footbridge, and descend using the elevator.
You’ll land on the wooden landing.
Use theteleporting deviceto teleport toHunrath.
Jump from the mechanism andturn the whole structure six times using thepanelunderneath it.
Enter the landing again, and teleport toKaptarwith it.
Once you complete the interaction, use the golden portal, and teleport to Hunrath.
Before proceeding with further actions, you might visitFarley’shouseto acquirethe Steam achievement connected to the Russian machine.
If you decide to ignore it, head straight toC.W.
Only difference is thatinstead of turning right, you have head straight ahead.
You’ll find a wall-portal that you have to cross.
You’ll find yourself in a vicinity of theBleeder.
Cross the bridge, and reach thechestlocated on one of the walls of the Bleeder.
Open it, and move theswitch.
Check the above screenshot.
Regardless of the chosen ending,you have to reach the top of the Tower.
From the current location, the shortest way leads throughmayor’s house.
While on the Tower, there is one last task remaining.Using thedetonator,you have to blast the Bleeder.
This action will start the sequence that ends the game.
This way, you’ll be a witness to the other ending, and receive the achievement.