tokens: Although Monte Carlo Tree Search is a commonly used in game - playing research , as well as some commercial games ( e.g. Creative Assembly 's " Total War : Rome II " ) , recent work has shown Rolling Horizon Evolutionary Algorithms ( RHEA ) to achieve a higher performance in many games , as well as offering many customisation opportunities : the underlying Evolutionary Algorithm can ranged from a 1 + 1EA , compact GA , CMA - ES and population - based GA .