在SteamLibrary\steamapps\common\Hearts of Iron IV\common\modifiers文件夹内找到00_static_modifiers.txt
打开后找到四个修改难度的
player：diff_very_easy_player。
player：diff_easy_player。
player：diff_normal_player。
player：diff_very_hard_player
然后再每个下面添加:
agency_upgrade_time = -0.6 #情报机构升级时间减少
intel_network_gain_factor = 0.3 情报网获取
boost_ideology_mission_factor = 0.99 增强意识形态任务效果
agency_upgrade_time = -0.99 贸易代表团影响
control_trade_mission_factor= 0.99 宣传任务的影响
propaganda_mission_factor= 0.99 外交压力任务效果
diplomatic_pressure_mission_factor= 0.99 加强抵抗效率
operation_cost = -0.6 #行动花费减少
operation_infiltrate_outcome = 0.3 #渗透效率增加
operation_outcome = 0.3 #行动效率增加
operation_risk = -0.6 行动风险
operative_slot = 10 #特工位增加10个【这个非常关键】
new_operative_slot_bonus = 3 #特工招募选项
political_power_factor = 0.9 #每日获得的政治点数
command_power_gain = 1 #每日指挥点数增长
production_speed_buildings_factor = 10.0 # 100#科学家%建筑速度
industrial_capacity_factory = 10 #增加工厂产量
production_factory_efficiency_gain_factor = 90 #生产效率增长速度
industrial_capacity_dockyard = 9 #增加船坞产量
experience_gain_army = 8 #陆军经验获取速度加成
experience_gain_air = 8 #空军经验获取速度加成
experience_gain_navy = 8 #海军经验获取速度加成
experience_gain_factor = 5.0 #將領經驗獲取加成 +500% (同時提高特性獲取率)
training_time_factor = -0.999 #减少训练时间
justify_war_goal_time = -0.999 #减少产生战争目标时间
occupation_cost = -0.9 #占领时间 -90%
send_volunteer_size = 1 #志愿军的师数上限
air_volunteer_cap = 1 #志愿空军上限
research_speed_factor = 100#科学家 #研究时间
own_operative_detection_chance_factor = -0.99#我方特工被发现几率系数
own_operative_capture_chance_factor = -0.99 #我方特工被捕几率
operation_make_resistance_contacts_outcome = -0.99#接触抵抗组织效率
operation_make_resistance_contacts_risk = -0.99#接触抵抗组织风险
scientist_xp_gain_factor = 100#科学家加成 经验
special_project_speed_factor = 100#科学家加成 特殊计划速度
scientist_breakthrough_bonus_factor = 100#科学家加成 突破点
scientist_research_bonus_factor = 100#科学家加成 研究速度
sp_tag_artillery_speed_factor = 100#科学家加成
sp_tag_submarine_speed_factor = 100#科学家加成
sp_tag_surface_ship_speed_factor = 100#科学家加成
specialization_nuclear_speed_factor = 100#科学家加成
sp_tag_nuclear_warfare_speed_factor = 100#科学家加成
sp_tag_nuclear_power_speed_factor = 100#科学家加成
极难模式效果如这样：
diff_very_hard_player = {
agency_upgrade_time = -0.99
boost_ideology_mission_factor = 0.99
control_trade_mission_factor= 0.99
propaganda_mission_factor= 0.99
diplomatic_pressure_mission_factor= 0.99
boost_resistance_factor= 0.99
intel_network_gain_factor = 0.99
operation_cost = -0.99
operation_risk = -0.99
operation_infiltrate_outcome = 0.99
operation_outcome = 0.99
operative_slot = 10
new_operative_slot_bonus = 10
political_power_gain = 1000
command_power_gain = 1000
production_speed_buildings_factor = 1000
production_factory_efficiency_gain_factor = 1000
industrial_capacity_dockyard = 1000
experience_gain_army = 1000
experience_gain_air = 1000
experience_gain_navy = 1000
experience_gain_factor = 1000
training_time_factor = -0.99
justify_war_goal_time = -0.99
occupation_cost = -0.99
send_volunteer_size = 10
air_volunteer_cap = 10
research_speed_factor = 1000
scientist_research_bonus_factor = 1000
own_operative_detection_chance_factor = -0.99
own_operative_capture_chance_factor = -0.99
operation_make_resistance_contacts_outcome = -0.99
operation_make_resistance_contacts_risk = -0.99
scientist_xp_gain_factor = 1000
special_project_speed_factor = 10000
scientist_breakthrough_bonus_factor = 1000
scientist_research_bonus_factor = 1000
sp_tag_artillery_speed_factor = 1000
sp_tag_submarine_speed_factor = 1000
sp_tag_surface_ship_speed_factor = 1000
specialization_nuclear_speed_factor = 1000
sp_tag_nuclear_warfare_speed_factor = 1000
sp_tag_nuclear_power_speed_factor = 1000
}
保存后就可以进入游戏啦！如果没效果要看清楚是不是每个难度都换了自变量，有些MOD有自己的static_modifiers.txt文件，还需要进MOD里再一次用同样的方法修改
出现这样就说明修改成功了 只对玩家自己有效
