ELEX
50 Achievements
80-100h
Safecracker
Cracked 50 safes
8.9%
How to unlock the Safecracker achievement in ELEX - Definitive Guide
In order to speed things along, there is a quest given by Martha in the Hort in Ignadon that tasks you with getting food supplies from an outpost to the southwest. You can view the screenshot below to see the exact location; just look for where the yellow quest markers are. Be warned that it is a long and dangerous journey to get there, but I was ill-equipped and still managed to make it. Just run a lot and make use of your jet pack when needed and you can outmaneuver the enemies.
Once in this location, you will find three safes that are opened with the same codes every time.
You can get the codes from Raudur, who can be found in the middle of the outpost. In the building near Raudur, there is a safe that can be opened every time with the code 1-4-5-5.
I tried it even without buying the codes from Raudur (which will cost you 250 shards) and it still worked. So, just save before the safe, then hack, then load your save and hack again until the achievement pops. Using this method makes things go much faster.
Safes are considered anything with an electronic panel and code required to open them. These include the doors in the Converters as well. You can brute force a safe open if you guess the code (or look it up online), though the proper way to do this is via a Hacking mini-game. I would suggest getting at least two skill points in Hacking, as you can't even start the mini-game if your Hacking skill is too low. Safes are somewhat scarce, so get this skill early and be sure to mark down where you found a safe if you can't open it when you first find it so you can come back later.
NOTE: You can quickly boost this by saving in front of a safe, hacking it, and reloading your save to do it again. The code will not change, so after the first hack you can simply enter the code which will also count.
Codes:
1758
9981
1455
They opened it, saved it, loaded the save before opening it, and so on until the trophy drops.