(Image credit: Supermassive Games) Just as you think you've made it through a tense episode of Directive 8020, you hit a puzzle that requires a key code to progress. Whether you've decided to send a distress signal or a warning to Earth in episode 7, you'll still need to find the serial number for the probe. It's not exactly hidden in plain view either. Much like every other key code you need to find throughout the game, you need four numbers to progress to the next part of the story. Rather than being a huge elaborate puzzle to solve, it's more about looking in the right places. Here's what you need to do so you can get into the probe. How to find the serial number for the probe in Directive 8020 The serial number for the probe is 2540 . You can find the answer yourself by using the two screens displaying part of the number on either side of the probe. Due to the storm on Tau Ceti f corrupting the probe, conveniently, parts of the number on both serial number screens are missing.…