During February 2026, Halgmor contributed to the cmss13-devs/cmss13 repository by developing a new cosmetic customization feature for marines, introducing a black headband option in the loadout system. Leveraging DM and skills in sprite integration and aesthetic design, Halgmor reused an existing headband sprite to minimize asset overhead and ensured compatibility with marine helmets. This approach maintained low QA risk while enhancing player customization and thematic immersion, aligning with the game's Aliens/Vietnam aesthetic. The work focused on safe loadout integration and thorough documentation, ultimately increasing player engagement and roleplay variety without introducing new bugs or technical debt.