Armored Core: Nine Breaker Training mode features 150 programs that test players' skills. Players can try out programs that focus on attack, defense, movement, technic, special and overall. Each of these areas are further divided, with attack comprised of multiple tests in accuracy, power, judgment, hit - single and hit - melee. Arena mode is a battle mode in which players take on other mechs in battle. Mech modification is featured heavily in Nine Breaker.