Can someone tell me how to get the hidden achievement? thx

So do we have a definitive answer on how to get this achievement?

steam says 'running' for few seconds but nothing happens and no errors (with or without steam client beta and/or steam overlay) I have winXP EDIT: Starting game directly from ..magnetized/nw.exe gives ReleaseSRWLockExclusive/kernel32.dll error, ReleaseSRWLockExclusive function is not available in windows XP (vista sp1 and up afaik) so unless im missing something ; DEVELOPERS PLEASE CHANGE MINIMUM SYSTEM REQUIREMENTS on steam store page !!! thank you...

I am making this thread just for a reference for others. I found the general location of where the save is located, but not the exact files. C:\Users\NAMEGOESHERE\AppData\Local\Magnetized\User Data