This case study outlines the use of Allegro CL by Nichimen Graphics in the development of the N-World Game Development System, which contributed to the success of Nintendo's Super Mario 64. Bob Coyne, the Director of Software Development at Nichimen, discusses the advantages of using Allegro CL's Common Lisp/CLOS for their product development. The document details how Allegro CL facilitates faster coding, easier debugging, and maintenance through features like dynamic linking, incremental compiling, and automatic memory management. Coyne emphasizes the importance of meta-data for debugging and application updates, allowing developers to efficiently work with large systems. The case study also highlights the customization capabilities provided by the meta-object protocol (MOP) and the use of domain-specific macros to simplify code complexity. Overall, the document presents a comprehensive view of how Allegro CL supports Nichimen's development processes and enhances their game development tools.