1. Enter the game in offline mode under any nickname to create a profile in the game folder
2. The downloaded file (Stats.bin) is copied to Killing Floor 2 \ Binaries \ Win64 (or 32) \ Profile \ profile name \ Stats
3. Start the game.
4. 284 of 285 achievements unlocked: characters, weapons, perks lvl 6
Killing Floor 2: Save Game (All achievements, characters, weapons, etc.) Free Download
Everything works for me so do not shout in the comments that who has everything became level 0, I immediately say that I do not remember for which version like 1064