how you win the delphi mission is when it starts you go right and then down along the beach, ignore the turrets. There is a single light tank you can kill easily. once its dead keep going along beach until you find a path up the ridge. go north hugging wall to avoid turrets until you exit the tiny canyon. once you get out of canyon go due east to edge of map and build base there. Tib field in sight on contruction yard and one south across fijord south. bridge north and tib field south dead end with a few nod in each but once they are dead no more come. all you have to gaurd is west. a couple turrets on ridges over tib field at west of map but you can ignore them for the whole game if you want to.