UNDECEMBER is a fast-paced hack-and-slash Action RPG with a dark atmosphere and a flexible progression system without rigid character classes. Builds revolve around Skill Runes and Link Runes, allowing players to combine abilities, enhance their effects, and create highly personalized combat styles. Gear farming, rune progression, story Acts, dungeons, and boss encounters form a constant loop of character growth. With Keyran, recurring gameplay actions can be organized more conveniently: skill sequences, consumable usage, command switching, inventory management, interface navigation, and other frequently repeated tasks. Adjustable delays help create a steady rhythm and more consistent input flow. Less attention goes into mechanical repetition, leaving more room for rune combinations, build optimization, gear farming, and experimenting with new skill setups.