Saints Row IV: Re-Elected
72 Achievements
Dear Santa
Find all the letters to Santa in the holiday missions.
6.1%
How to unlock the Dear Santa achievement in Saints Row IV: Re-Elected - Definitive Guide
A bug mabye?
Hope it helps.
You cannot replay regular non DLC missions though. But the regular game only has collectibles in the free roam open world, so they are not missable.
Check this post for the locations of the Letters to Santa, Holiday Text Adventures and Snowman vignettes.
There are 10 letters in total. 5 in the first mission, 3 in the second, 1 in the last and one for completing the DLC. Therefore, if you got them all you'll unlock this in the final cutscene. The locations are:
1. On the stage directly in front of you and to the left from where you start, behind singers.
2. On the top of the theatre screen.
3. On one of the buildings making the circle around the pool you must retrieve the projector from.
4. When you are tasked to protect CID, on the stage in front of the courthouse.
5. On the front wall of the courthouse.
6. Now on the second mission, near where you find the second snowman on the edge of a roof.
7. When you enter the workshop, turn left straight away. If you have got inside the present, you have gone too far but you can go back for it, as it is in that room.
8. In Santa's room, where you receive the new dubstep gun, it is on the desk on the other side of the room.
9. On the final mission, from where you start on the ground, go to the building north east of you, and it is on the porch.
10. Obtained by completing the DLC.
You will collect 9 according to the plot, and the 10th you will get to kill the final boss.
If you have already opened the item detector in the main game.
Then all letters will be visible on your map.
If you haven't opened the detector yet. Then my video guide will help you.