The action of Goodbye Deponia will take you back to the blue Rufus. Click the button at the door. To get to the boat, you need a memory card with codes. Walk through the walkway on the right. You will get to the Argus' office. Watch the safe - you need to know the opening combination. Take your voice recorder lying on your desk. When Argus appears, hide behind your desk. Argus tells Oppenbot to find a recorder. Click on the device in your inventory with RMB. Remove the memory card and place an empty recorder on your desk. Click Argus and choose "The cartridge is in the safe. The combination is 4437". When the alarm sounds, take the recorder and get into the window. Open them and go outside. Insert the memory card into the recorder and press playback. The code is 4473.
Record a new message - select the last option: "The cartridge is not in the safe. It fell behind the desk". Return to the room and place the voice recorder on your desk. Turn off the alarm with the button at the bottom. When Argus is busy searching the floor next to the desk, go out of the window and enter the office through the window at the top. Click on the safe. The first time Rufus makes a mistake, but try again. Take the memory card with codes. Go outside and proceed with your Goodbye Deponia adventure.