A universal RPG system¸ developed from the fantasy RPGYsgarth. It uses a percentile skill system¸ with limited point-bought character creation. It has an action point based combat system. There were numerous background books¸ some which came with complete TCT mechanics¸ including: ""By the Gods"" (mythological)¸ ""Challengers"" (superhero)¸ ""Cyberia"" (cyberpunk)¸ ""Esperagents"" (psychic espionage)¸ and ""Triad"" (sci-fi). - A description from https://darkshire.net/jhkim/rpg/encyclopedia/ with kind permission of John H. Kim