Add 9999 to Barter Menu (still have to trade at least one thing)
EnemiesDamageModifier (Set to -1 to negate damage)
EnemiesHitChanceModifier (set to -200 or lower to prevent enemy from hitting)
NOTE: This is an annoying game to find variables for. I've seen few that obfuscate them so well. I assume it's intentional, but god knows why for a single player game. Haven't found health, but you can disable enemy damage with "EnemiesDamageModifier" and set your health to enormous values with "PlayersHpBoost" and "CompanionsHpBoost".