This post outlines a detailed process of creating a tool-assisted speedrun (TAS) of 'Castlevania' on the NES. The author shares personal insights on adapting a security mindset to exploit game memory for optimization, describing specific glitches and techniques to manipulate the game mechanics for an accelerated playthrough. The post serves not only as a documentation of the speedrun but also as an educational piece on game development, glitch hunting, and the intricacies of NES architecture.