Okay. I'll try. Some on the community forums said you drag the old save files from the toa folder to the new version each time one comes out.
It's a hard game but i wanna beat it at least once. I gotta get all this updates.
i'll suggest you to complete as many achievements as you can before trying to 'beat the game', because it will get a little bit easier. Not too much, but it does help.
