Jul 6, 2026
View on Steam↗HOI IV - Open Beta Summer Edition™
3/5 Moderate
BETAMassive rebalancing of Regimental Support and Line Artillery alongside a fundamental change to how Battalion Adjusters scale with equipment.
Key Changes
- 1Battalion Adjusters now scale with equipment status, removing bonuses from unequipped units
- 2Massive nerfs to Regimental Support companies, including increased equipment costs and stat penalties
- 3Significant buffs to Line Artillery Breakthrough and Max Strength to improve offensive viability
- 4Combat Width for all Self-Propelled Artillery variants increased from 2 to 3
- 5Division Experience combat bonus reduced from 25% to 20% with adjusted level scaling
- 6Naval targeting for bombers against Carriers increased from 10 to 25
- 7Facilities base cost reduced to 10000 but scaling cost increased to 6000
- 8Admiral positioning bonuses from traits and skills significantly reduced
- 9Air Spirit design cost reductions replaced with Mastery Track gain factors
- 10Extensive rebalancing of Land Doctrine rewards across multiple branches
All Changes
⚙️Gameplay Systems(5)
- changeBattalion Adjusters: Battalion Adjusters now scale with the Equipment and Manpower status of the Sub-Unit, preventing bonuses from units without equipment.
- fixEssential Equipment Blocks: Added Essential Equipment Blocks for Heavy Weapons Company, Flame Tanks, and various Staff units to ensure proper modifier scaling.
- changeHelicopter: Adjusted Essential Equipment Blocks for Helicopter Med-Evac and Helicopter Transports.
- buffFacilities: Naval, Land, and Air Facilities base cost lowered from 12000 to 10000.
- nerfFacilities: Scaling cost per facility increased from 5000 to 6000, making the 4th facility and beyond more expensive.
⚓Naval Combat(6)
- changeSuperior Tactician: Superior Tactician Admiral Trait now provides +15% Positioning Bonus instead of +25% Surface Detection.
- nerfPositioning: Surface Detection impact on positioning reduced from maximum +25% to +15%.
- nerfAdmiral Maneuver Skill: Admiral Maneuver Skill impact on positioning reduced from +2.5% to +1.5% per level.
- buffAdmiral Maneuver Skill: Admiral Maneuver Skill impact on naval retreat speed increased from +1% to +2% per level.
- buffNaval Bomber: Naval targeting values for naval bombers against fully screened capitals increased from 10 to 15.
- buffNaval Bomber: Naval targeting values for naval bombers against fully screened carriers increased from 10 to 25.
🎖️Land Combat(9)
- nerfDivision Experience: Combat Bonus from division experience decreased from 25% to 20%.
- changeDivision Experience: Experience penalties/bonuses adjusted: Green (-20%), Trained (0%), Regulars (+20%), Seasoned (+40%), Veterans (+60%).
- nerfSupport Artillery: Support Artillery and Support Rocket Artillery stat penalties increased from -40% to -50% for Soft Attack, Hard Attack, Defense, and Breakthrough.
- nerfSupport Anti-Air: Support Anti-Air equipment requirement increased from 20 to 24.
- changeMotorized Anti-Air: Motorized Anti-Air moved to Anti-Air Unit Category; category renamed to Anti-Air Artillery Support & Line.
- nerfAnti-Tank 1940: Anti-Tank 1940 Technology no longer provides Motorized Anti-Tank with +10% Piercing and +10% Hard Attack.
- nerfSelf-Propelled Artillery: Combat Width for Light, Medium, Heavy, and Modern Self-Propelled Artillery increased from 2 to 3.
- nerfAmtrac: Improved Amphibious Designs Amtrac production cost reduction lowered from 15% to 10%.
- fixHelicopter: Helicopter Brigade and Helicopter Logistics now have proper fuel consumption instead of -100%.
✈️Air Combat(6)
- changeAir Crew Surveys: Air Crew Surveys Air Spirit Mastery gain combined into Air Doctrine Mastery gain Factor.
- changeDive Bombing: Dive Bombing Air Spirit design cost reduction replaced with +15% Strike Aircraft Mastery Track gain Factor.
- changeMaterial Destruction: Material Destruction Air Spirit design cost reduction replaced with +15% Medium Aircraft Mastery gain Factor.
- changeIndustrial Destruction: Industrial Destruction Air Spirit design cost reduction replaced with +15% Heavy Aircraft Mastery gain Factor.
- nerfContinuous Strike: Continuous Strike Air Spirit Air Support Efficiency bonus reduced from 25% to 15%.
- buffMassed Strike: Massed Strike Air Spirit Air Superiority Effect increased from +5% to +10%.
🛠️Regimental Support(18)
- buffHeavy Weapons Company: Heavy Weapons and Motorized Heavy Weapons Company Organization increased from 20 to 30.
- buffHeavy Weapons Company: Heavy Weapons and Motorized Heavy Weapons Company Max Strength increased from 0.4 to 0.6.
- nerfInfantry Guns: Infantry Guns and Rocket Battery equipment requirement increased from 4 to 6.
- changeInfantry Guns: Infantry Guns and Rocket Battery stat penalties normalized to -75% for Defense, Breakthrough, Soft and Hard Attack.
- nerfAnti-Air Battery: Anti-Air Battery equipment increased from 12 to 16 and manpower from 120 to 180.
- buffAnti-Air Battery: Anti-Air Battery Breakthrough, Soft Attack, and Hard Attack penalties lowered from -80% to -60%.
- nerfAnti-Tank Battery: Anti-Tank Battery manpower requirement increased from 120 to 180.
- buffAnti-Tank Battery: Anti-Tank Battery Soft Attack penalty lowered from -80% to -60%.
- nerfTD-RS: Tank Destroyer and SPAA Regimental Support units now require 15 vehicles instead of 10.
- nerfTD-RS: TD-RS and SPAA-RS fuel consumption increased from 33% to 40% of equipment.
- nerfTD-RS: TD-RS and SPAA-RS Armor Value penalty increased from -33% to -66%.
- nerfTD-RS: TD-RS and SPAA-RS Defense penalty increased from -25% to -50%.
- nerfTD-RS: TD-RS and SPAA-RS Soft-Attack penalty increased from -33% to -66%.
- nerfSPAA-RS: SPAA-RS Air Attack penalty increased from -15% to -25% and Hard Attack from -33% to -66%.
- nerfTD-RS: TD-RS Hard Attack penalty increased from -33% to -50%.
- nerfTD-RS: Artillery Technologies impact on TD-RS and SPAA-RS Hard/Air Attack halved from +30% to +15%.
- changeInfantry Guns: Infantry Guns now receive benefits from Artillery tech tree instead of Infantry Support Weapons.
- nerfInfantry Guns: Infantry Guns and Rocket Battery scaling with technologies reduced; Defense boost removed for Infantry Guns.
💥Line Artillery(7)
- buffLine Artillery: Max Strength for Line and Motorized Artillery, Rocket Artillery, Anti-Tank, and Anti-Air increased from 0.6 to 0.8.
- buffArtillery Equipment I: Artillery Equipment I: Soft Attack +1, Defense +1, Breakthrough +4.
- buffArtillery Equipment II: Artillery Equipment II: Breakthrough +6, Hard Attack +1, Piercing +2.
- buffArtillery Equipment III: Artillery Equipment III: Breakthrough +8, Defense +1, Hard Attack +2, Piercing +4.
- buffRocket Artillery Equipment I: Rocket Artillery Equipment I: Defense +1, Breakthrough +8, Soft Attack +2.
- buffRocket Artillery Equipment II: Rocket Artillery Equipment II: Defense +1, Breakthrough +8, Soft Attack +2.
- buffMotorized Rocket Artillery: Motorized Rocket Artillery: Defense +1, Breakthrough +8.
📖Land Doctrines(15)
- buffMobile Infantry: Mobile Infantry 1: Cavalry Recon receives +10% Defense and Breakthrough.
- changeMobile Infantry: Mobile Infantry 3: Soft Attack bonus to Infantry Guns/Rocket Batteries reduced to 10%; added 5% Defense and Breakthrough.
- buffMobile Infantry: Mobile Infantry 5: Motorized Heavy Weapons Company Organization bonus increased from +5 to +10.
- buffDefensive Postures: Defensive Postures 1: Heavy Weapons Company receives +0.2 Entrenchment.
- buffAssault Infantry: Assault Infantry Adoption: Support Artillery attack bonus increased from +10% to +20%.
- nerfMounted Infantry: Mounted Infantry 4: Speed bonus to Cavalry/Recon reduced to +40% (8 kph total).
- buffMounted Infantry: Mounted Infantry 5: Speed bonus to Artillery, AA, AT, and Rocket Artillery increased to +100% (8 kph total).
- buffGreat War Infantry: Great War Infantry 3: Support Artillery Breakthrough bonus for Leg Infantry increased from +5% to +10%.
- buffGreat War Infantry: Great War Infantry 5: Added +5 Max Entrenchment.
- changeFire Concentration: Fire Concentration Adoption/1: Defense bonus to Line Artillery changed to +10% Breakthrough.
- changeFire Concentration: Fire Concentration 3: Breakthrough bonus changed to +10% Defense; Soft Attack bonus increased to +10%.
- buffFlying Batteries: Flying Batteries 3: Armored Signal Company provides +0.2 Strength to Line Artillery.
- nerfSelf-Propelled Support: Self-Propelled Support Reward 3: Speed bonus reduced from +30% to +10%.
- changeSiege Artillery: Siege Artillery 2: Plains Movement bonus for Super Heavy Artillery replaced with 0.1 Recovery Rate.
- buffMission Type Tactics: Mission Type Tactics Adoption: Daily Command Power gain increased from +0.02 to +0.2.
🐛Bug Fixes(1)
- fixLight Tank Destroyer: Light Tank Destroyer Regimental Support now correctly has the same Soft Attack penalty as other TD-RS units.
Summary
Open Beta: Sommarfältprov
This beta update, codenamed 'Sommarfältprov', introduces a sweeping balance overhaul for Hearts of Iron IV. The primary focus is addressing 'stat bloat' by nerfing overperforming Regimental Support companies and buffing Line Artillery to make it a more viable offensive tool. Additionally, the update changes how Battalion Adjusters function, ensuring modifiers only apply when units are properly equipped and manned, preventing 'imaginary' stat bonuses.