It is according to (and need) the original Hwaet SRD. It's linked inside, but not copy-pasted to respect its maker. It's not a videogame like yours, it's TTRPG - so its game engine is your brain!:)
It can be played without GM - with the SRD tables. For TALE, choose random Norse tale (the most famous is The Ring of the Nibelung).
Your PC can not die (!:)), just reincarnate.
I added an inspirational true story related to the transformative TTRPG: https://novelo.com/story/1595.