You're not an adventurer. You're some poor schmuck whose father had a farm, same farm his grandfather did and so on. You're a guy who toils in the fields, who happened to be on the wrong side of the road when the Lugal came by conscripting those surrounding his city for a little hike over the hill and down to the river valley to face the army of the opposite city. Oh, and he has a job for you that involves raiding the other guy's camp and stealing away the Cup of Indrikal, which they say contains the power that Irrup-sa-gal uses in battle. Good luck there, Sparky! If you manage to take a noble prisoner, well, that ransom money might allow you to do a few upgrades and increase your standing in the world.
You're not an adventurer. You were supposed to be married off to some idiot, but what your father DIDN'T know was that you've been hanging around with the sister of the smith. Yes, the smith, that strange man who knows how to fold and beat the metal that brings strange power to your world. The sister even knows... WRITING! Somehow, that's made a connection in your head, but the dark little being that sits at the foot of your bed hasn't been persuaded yet to tell you, even as he teases you with the promise of power. He started showing up when you started wearing the metal around your neck and Gil-a-kel's voice in your head grew less.
You're not an adventurer. You're sweeping the halls of the Lugal's second home. You know that the fervor of worshiping Ish-ri-kal fills your blood and that you've had a knack for chasing away the flu demons and healing the wounds of battle. You've also smited a few enemies while screaming the cries of your god. The Lugal liked that, especially when he was taking the spoils of battle from you in exchange for giving you a place in Ishrikal's priesthood. But man, sweeping halls suck! But something is going on, because there is a lot of talk of sending people to the Underworld to try and bring back Al-kas-hag's soul back to his body. Strange tales of what lies there... riches and strange rewards. Maybe you'll get lucky... or maybe you'll never come back.
And did I mention that you'll be stretching your timeline from your Father to your sons/daughters and their sons/daughters? There's a civilization to be made... and gods to serve.