As an adaptation, it fails- And as for the series as a whole, it's just another generic fantasy novel with a gimmick element as a hook.
Momonga, the guild leader of Ainz Ooal Gown, wants to wait out the last few minutes of in-game reminiscing.
Unfortunately, she inhabits the body of Catarina Claes, the antagonist of the game where all canonical happy endings end in her demise.