An Outside System Skill (システム外スキル, Shisutemu-gai Sukiru?) is an ability, usually referred to as a skill, that either involves unconventional use of system-controlled skills, the exploitation of loopholes in the system, or the use of the player's human abilities to enhance their gameplay. Although such abilities are referred to as "skills", none are regulated by the system, though some involve making use of system skills in ways that were not intended by the developers of the game.