Saints Row IV

Alrighty, to get this achievement there are two steps required. First, collect all 8 computers in the dlc. Second is to play all 8 text adventures on your computer on your ship when all are collected. After that the achievement will pop. Now onto the locations.

1) Mission 1- There is one on top of the building where you acquire the BB gun.

2) Mission 1- After you are tasked to grab the projector you will be taken to an area with a frozen pool and enemies. There will be group of toy boxes as well. Amongst the boxes will be the next computer.

3) Mission 1- Shortly after computer two you are tasked to take the projector to the drive-in. On the rooftop where you place it will be the next text adventure.

4) Mission 1- Toward the end of the mission you will be tasked to protect CID from the enemies while he does his thing. Once done he will ask you to go on the clocktower's roof. It is there you will find the 4th text adventure.

Credit goes to ID357 for helping me with the location.

5) Mission 2- In the east side stables on the second floor. You'll be forced to enter that building during the main quest. There are two stables so just in case, pop upstairs at each one to make sure you get it.

6) Mission 2- Once you make it into the workshop you will meet Mrs. Claus. Once you get out if the box, head backwards into another room. On your right will be a room with a computer on a table.

7) Mission 3- When you're on ground again in the second part of the mission you are tasked with lighting the Mennorah. You will find the computer on a medium size sky scrapper north of the Santa's Grotto.

Credit goes to Akinokaze for the wonderful find!

8) The last one will be given to you once you completed the DLC( all 3 missions if you're curious.)

After all 8 make sure you play them in the ship. Once done, the achievement is yours.

Edit: If you're confused on where the computer is, I shall explain where to find it. When you return to the ship, head downstairs to the middle room where pierce is. If anything, it's the room you have to go into when you accept the first mission for the DLC. Find the computer in the room and access it. From there just click on Santa text adventures and do all 8 of them.

In addition what was mentioned above, can use this vid as a ref guide to find computers through out each mission to obtain the cheevo.

To get this achievement you must initially collect 8 computer ( text adventures ) and after finishing the DLC ( you collect the 8th computer by finishing the DLC ) you must go on your ship and play the latest text adventure ( could be obtain playing only the latest, I've tested this ). To play the text adventures you must go downstair to the middle room where is Pierce and get access at his computer. Select the Santa's text adventure and complete the last.
There are 4 computer in the first mission, 2 computer in the second mission and 1 in the third and last mission. The last computer (8th) is collected by finishing the DLC.
Follow the videos to find it easily ( the videos are in chronologic order by first to the 7th computer ).