i beat the forge 2 times. i saw the ending cut scene,watched the credits,got the achievements. however,the game doesn't seem to save that fact. after i go back it says continue then i have to fight the boss again. old school isn't unlocked and the tweaks aren't unlocked. any ideas?????
Check in the main menu if you have a really small button hinting that you should click the select button to activate that mode
That's right. The last checkpoint is right before the battle with Annuvin. After beating Annuvin, activating Adventure+ from the menus will unlock the tweaks functionality and old-school difficulty.