How to Hack a Computer Terminal in Fallout 3

Raise your Science level. Your Science level determines which terminals you can even attempt to hack. You can add points to your Science level whenever you level up, and you can pop Mentats to get temporary a temporary boost. The scientist's labcoat from the quest "Those" will give you a +10 to Science when you are wearing it. You can put up to 100 points in Science, and there are five different tiers of hacking difficulties. You cannot attempt to hack terminals that you do not meet the requirements for:

• Very Easy - 0
• Easy - 25
• Average - 50
• Hard - 75
• Very Hard - 100

Get familiar with the hacking interface. When you interact with a terminal that you can hack, you'll be taken to the hacking screen. The top of the screen will tell you how many attempts you have left. The bottom of the screen will be a garbled mess, and you'll be able to make out a variety of words among the random characters. These words are potential passwords, and you'll need to guess the correct one before you run out of tries. Words may wrap down to the next line, and all of the potential words will be the same length.

Select a word as your first guess. Try to pick a word that has lots of unique letters in it, as this will make it easier to narrow down the potential candidates. If you get lucky and select the correct word right away, you're good to go. If the word is not the correct password, you'll be shown a number.

• A higher Science skill will reduce the number of words that you have to choose from.

Determine how many characters are correct. When a password fails, you'll see a readout telling you how many characters were correct and in the right position. For example, a 4/9 would mean that four of the letters in the chosen word were the correct letter in the correct place. There could be more correct letters in the word, but they don't count if they weren't in the right position.

Choose the next word. Compare the word that you selected to the words remaining on the screen, and try to narrow them down. For example, if you got a 3/12, and the word you selected is CONSTRUCTION, the other words will need to have three letters in the same place. There's a good chance that the other word ends in ION, as it is a common ending. Select the next word that you think could fit to see the results.

Use bracket tricks before moving on to the third word. One of the keys to successfully hacking is using "bracket tricks". If the terminal contains a bracket pair, removing it will get rid of incorrect choices or add tries back to your counter. This is why it's recommended that you save the brackets until you've made a few guesses so that you don't waste potential retries. Bracket pairs appear at random, though more tend to show up with a higher Science skill.

• Brackets are {}, [], <>, and (). The bracket pairs can contain any number of characters between them.
• The easiest way to find a bracket pairs is to slowly move your cursor across every character on the terminal screen. Bracket pairs and all of the characters in between will automatically be highlighted.
• You may want to save a bracket pair or two in case you need them before your last attempt.

Choose a third word. If the brackets haven't helped and you haven't chosen the correct word in the first two chances, you should at least have a better idea of what letters are in the correct space. Compare the results from the two words that you've already chosen and see if you can determine the letters that are supposed to be there. Use this comparison to pick the next word.