This can be done with a HDD or a USB (but not a MU), first of all download these:
Profile editor
Xplorer360
Once you've downloaded those, follow these steps:
Step one:
Plug your USB/HDD into you pc, then open Xplorer360. Drag and drop your profile to somewhere like your desktop/my documents. (Remember where you found it, you'll need to know later on)
Step two:
Open profile editor, click open and find your profile (From desktop/my docs). You will then see a list of all the games you've got on the left and the achievements on that game on the right.
Step three:
Click on an achievement you want to unlock and click either online or offline on the bottom (Online if the achievement can only be got online, offline if you can get it on single player). You will be asked to set a date if it's online, do that then click set. Or you can click Unlock All.
Step four:
Now you've got the achievements you want save the profile (File > Save)
Step five:
Now open Xplorer and take your profile from where you put it in step one back to where you found it to start with.
Step six:
Turn your console OFF, plug in the USB/HDD then turn your console back ON.
Now you should have the achievements that you unlocked.
If you have any problems please pm me.
Downloads found on Google, if they need re-uploading at any time pm me.
Sorry there's no screens, I'll add them if I do this again.
I am not responsible if you get banned or if your gamerscore is reset.
Profile editor
Xplorer360
Once you've downloaded those, follow these steps:
Step one:
Plug your USB/HDD into you pc, then open Xplorer360. Drag and drop your profile to somewhere like your desktop/my documents. (Remember where you found it, you'll need to know later on)
Step two:
Open profile editor, click open and find your profile (From desktop/my docs). You will then see a list of all the games you've got on the left and the achievements on that game on the right.
Step three:
Click on an achievement you want to unlock and click either online or offline on the bottom (Online if the achievement can only be got online, offline if you can get it on single player). You will be asked to set a date if it's online, do that then click set. Or you can click Unlock All.
Step four:
Now you've got the achievements you want save the profile (File > Save)
Step five:
Now open Xplorer and take your profile from where you put it in step one back to where you found it to start with.
Step six:
Turn your console OFF, plug in the USB/HDD then turn your console back ON.
Now you should have the achievements that you unlocked.
If you have any problems please pm me.
Downloads found on Google, if they need re-uploading at any time pm me.
Sorry there's no screens, I'll add them if I do this again.
I am not responsible if you get banned or if your gamerscore is reset.