In the fields of game design and interactive storytelling, it is of value to consider game mechanics, narrative design, and how they connect and influence each other. Dubbelman’s Narrative game mechanics theory (2016) started an argumentation that certain game mechanics can serve greater narrative power. This research sees a lack of practical considerations and game development guidelines from Dubbelman’s work and tries to conduct a theoretical framework on useful narrative and game design theories and practical considerations focusing on a subset of game mechanics, numerical narrative game mechanics. The framework covered an in-depth explanation of the process from mechanics to narratives, the role of the player during the narration process and related practices one can utilize, an analytical perspective of numerical elements and numerical mechanics, and ways to improve narratability and representation of contexts. Three case studies of existing games are also conducted to present the use of the framework and improve its applicability.