During January 2025, Dan contributed to the crawl/crawl repository by implementing a Penance Title System and resolving a combat-related bug. He used C++ to ensure that spells designed to always hit would function correctly even when the player character was blinded, improving combat reliability and aligning spell mechanics with intended gameplay. Dan also developed a system that assigns a persistent penance title to players who abandon their deity while holding an invocations title, reinforcing thematic consequences and deepening player engagement. His work demonstrated careful debugging, clear commit messaging, and maintainable code changes, reflecting strong skills in feature implementation and game development.