First I though "how is this even possible?" but the Game is meant to played several times, I think you need to play it at least thee times trough. At every Passing you get a new Blessing and there is one that make the achievement very easy (you can save scum at the Blessing Point, just save check the Blessing and exit the Game if you want to re-roll)
- Hestr's kelp helper - 1000- Fruit/veg degrade slower & heal more
- Nekla's undying - 1000 - Health continuously regenerates
- Patience of Imakl - 1000 - Hunger increases at reduced rate
Hint: If you are playing on Story Mode, make sure you switch back to Survivel-Mode (else you cant restart the Game from Chapter one) after you played trough the Game. You keep every Item in your "Helt Items", Blessing and Unlocks.