With this save files you can unlock every achievement on Steam on PC version. Endorsements should go to original makers but it was so many sources that I don't remember from where I downloaded it. Maybe you will find some in text files. Many of original files was for PS3/Xbox360. I decrypted it for PC version.

INFORMATION! (2023)
1. This 'mod' is just save files that can help you to unlock achievements.
2. I'm sorry but I barely used nexusmods page, and now I don't even use it - that's why I don't reply to any posts here or forum. Consider this 'mod' unsupported.
3. For people that saying this is purely cheating. Yes, if you downloaded files just to unlock all achievements - this is cheating. But this save files can be helpful for people that spent time to unlock achievement but something glitched and/or bug occured. Instead of starting all over (without your fault) you can just help yourself with one of this files. That was the purpose of creating this 'mod'.