Special Projects

All 141 Special Projects research technologies from HOI4 v1.19 — real costs, years, prerequisites and unlocks mined from the game files.

Special Projects technologies (141 entries)
Tech	Cost	Year	Prerequisites	Leads to	Unlocks	Effects
`Heavy SP Artillery III` advanced_heavy_art	0.5	1943	—	—	Equipment: `heavy_tank_artillery_equipment_3`	—
`Heavy SP Anti-Air III` advanced_heavy_spaa	0.5	1943	—	—	Equipment: `heavy_tank_aa_equipment_3`	—
`Heavy Tank Destroyer III` advanced_heavy_td	0.5	1943	—	—	Equipment: `heavy_tank_destroyer_equipment_3`	—
`Light SP Artillery III` advanced_light_art	0.5	1941	—	—	Equipment: `light_tank_artillery_equipment_3`	—
`Light SP Anti-Air III` advanced_light_spaa	0.5	1941	—	—	Equipment: `light_tank_aa_equipment_3`	—
`Light Tank Destroyer III` advanced_light_td	0.5	1941	—	—	Equipment: `light_tank_destroyer_equipment_3`	—
`Medium SP Artillery III` advanced_medium_art	0.5	1943	—	—	Equipment: `medium_tank_artillery_equipment_3`	—
`Medium SP Anti-Air III` advanced_medium_spaa	0.5	1943	—	—	Equipment: `medium_tank_aa_equipment_3`	—
`Medium Tank Destroyer III` advanced_medium_td	0.5	1943	—	—	Equipment: `medium_tank_destroyer_equipment_3`	—
`Advanced Modern Tank Turret Tech` advanced_modern_tank_turret_tech	undefined	1936	—	—	Modules: `advanced_modern_tank_turret`	—
`Advanced Rocket Engines` By Blood Alone advanced_rocket_engines	1.5	1946	—	—	Equipment: `[object Object]`, `[object Object]` Modules: `rocket_engine_3`, `guided_anti_ship_missile`	Show Equipment Icon true `rocket_artillery_brigade`: Soft Attack +0.05 `mot_rocket_artillery_brigade`: Soft Attack +0.05 `motorized_rocket_brigade`: Soft Attack +0.05
`Anti-Tank Armored Car` armored_car_at_upgrade	1	1942	—	—	Equipment: `armored_car_at_equipment`	Sub Tech Index +1
`AST War Carriers Tech` AST_war_carriers_tech	1,1	1936,1936	—	—	—	`logistics_company`: Supply Consumption Factor -0.15
`Heavy SP Artillery I` basic_heavy_art	0.5	1934	—	—	Equipment: `heavy_tank_artillery_equipment_1` Units: `heavy_sp_artillery_brigade`	—
`Heavy SP Anti-Air I` basic_heavy_spaa	0.5	1934	—	—	Equipment: `heavy_tank_aa_equipment_1` Units: `heavy_sp_anti_air_brigade`	—
`Heavy Tank Destroyer I` basic_heavy_td	0.5	1934	—	—	Equipment: `heavy_tank_destroyer_equipment_1` Units: `heavy_tank_destroyer_brigade`	—
`Light SP Artillery I` basic_light_art	0.5	1934	—	—	Equipment: `light_tank_artillery_equipment_1` Units: `light_sp_artillery_brigade`	—
`Light SP Anti-Air I` basic_light_spaa	0.5	1934	—	—	Equipment: `light_tank_aa_equipment_1` Units: `light_sp_anti_air_brigade`	—
`Light Tank Destroyer I` basic_light_td	0.5	1934	—	—	Equipment: `light_tank_destroyer_equipment_1` Units: `light_tank_destroyer_brigade`	—
`Medium SP Artillery I` basic_medium_art	0.5	1939	—	—	Equipment: `medium_tank_artillery_equipment_1` Units: `medium_sp_artillery_brigade`	—
`Medium SP Anti-Air I` basic_medium_spaa	0.5	1939	—	—	Equipment: `medium_tank_aa_equipment_1` Units: `medium_sp_anti_air_brigade`	—
`Medium Tank Destroyer I` basic_medium_td	0.5	1939	—	—	Equipment: `medium_tank_destroyer_equipment_1` Units: `medium_tank_destroyer_brigade`	—
`Chasseurs Ardennais` BEL_chasseurs_ardennais	1	1936	—	—	—	—
`BEL Chasseurs Ardennais Ncns` BEL_chasseurs_ardennais_ncns	1	1936	—	—	—	—
`Bicycle Infantry` bicycle_infantry	1	1936	—	—	Units: `bicycle_battalion`	—
$blackshirt_assault_battalion$ blackshirt_assault_battalion_tech	1	1936	—	—	Units: `blackshirt_assault_battalion`	—
`Camelry` camelry	1	1936	—	—	Units: `camelry`	—
$ITA_camicie_nere$ camicie_nere_security_militias	1	undefined	—	—	—	`military_police`: Suppression Factor +0.05
`Coastal Defense Ships` coastal_defense_ships	1	1936	—	—	Equipment: `ship_hull_cruiser_coastal_defense_ship`	—
`Commercial Nuclear Reactor Tech` commercial_nuclear_reactor_tech	undefined	1936	—	—	Buildings: `commercial_nuclear_reactor` (level 1)	—
`Cruiser Submarine Hull` cruiser_submarines	1	1936	—	—	Equipment: `ship_hull_cruiser_submarine` Modules: `ship_extra_fuel_tank`	—
`Carrier Close Air Support I` cv_CAS1	1	1936	—	—	Equipment: `cv_CAS_equipment_1`	—
`Carrier Close Air Support II` cv_CAS2	1	1940	—	—	Equipment: `cv_CAS_equipment_2`	—
`Carrier Close Air Support III` cv_CAS3	1	1944	—	—	Equipment: `cv_CAS_equipment_3`	—
`Inter-War Carrier Fighter` cv_early_fighter	1	1933	—	—	Equipment: `cv_fighter_equipment_0`	—
`Carrier Fighter I` cv_fighter1	1	1936	—	—	Equipment: `cv_fighter_equipment_1`	—
`Carrier Fighter II` cv_fighter2	1	1940	—	—	Equipment: `cv_fighter_equipment_2`	—
`Carrier Fighter III` cv_fighter3	1	1944	—	—	Equipment: `cv_fighter_equipment_3`	—
`Carrier Naval Bomber I` cv_naval_bomber1	1	1936	—	—	Equipment: `cv_nav_bomber_equipment_1`	—
`Carrier Naval Bomber II` cv_naval_bomber2	1	1940	—	—	Equipment: `cv_nav_bomber_equipment_2`	—
`Carrier Naval Bomber III` cv_naval_bomber3	1	1944	—	—	Equipment: `cv_nav_bomber_equipment_3`	—
`Desert Training` desert_training_tech	1	undefined	—	—	—	—
`Elephantry` elephantry	1	1936	—	—	Units: `elephantry`	—
`ETH Improved Irregular Infantry Tech` ETH_improved_irregular_infantry_tech	1	undefined	—	—	—	`irregular_infantry`: Max Organisation +10
`Fleet Submarine` fleet_submarines	undefined	undefined	—	—	—	—
`Heavy Armored Car` GER_heavy_armored_car	1	1936	—	—	Equipment: `[object Object]`	Sub Tech Index +1 `armored_car_recon`: Max Strength +3 `armored_car_recon`: Max Organisation +2 `armored_car_recon`: Armor Value +0.5 `armored_car_recon`: Recon +1 `armored_car_recon`: Defense +0.1
`Super-Heavy Battleship I` heavy_battleship	2	1936	—	—	Equipment: `SH_battleship_1`	—
`Hills Training` hills_training_tech	1	undefined	—	—	—	—
`Light Infantry Divisions Doctrine` HUN_light_infantry_tech	1	undefined	—	—	—	—
`Heavy SP Artillery II` improved_heavy_art	0.5	1941	—	—	Equipment: `heavy_tank_artillery_equipment_2`	—
`Heavy SP Anti-Air II` improved_heavy_spaa	0.5	1941	—	—	Equipment: `heavy_tank_aa_equipment_2`	—
`Heavy Tank Destroyer II` improved_heavy_td	0.5	1941	—	—	Equipment: `heavy_tank_destroyer_equipment_2`	—
`Light SP Artillery II` improved_light_art	0.5	1936	—	—	Equipment: `light_tank_artillery_equipment_2`	—
`Light SP Anti-Air II` improved_light_spaa	0.5	1936	—	—	Equipment: `light_tank_aa_equipment_2`	—
`Light Tank Destroyer II` improved_light_td	0.5	1936	—	—	Equipment: `light_tank_destroyer_equipment_2`	—
`Medium SP Artillery II` improved_medium_art	0.5	1941	—	—	Equipment: `medium_tank_artillery_equipment_2`	—
`Medium SP Anti-Air II` improved_medium_spaa	0.5	1941	—	—	Equipment: `medium_tank_aa_equipment_2`	—
`Medium Tank Destroyer II` improved_medium_td	0.5	1941	—	—	Equipment: `medium_tank_destroyer_equipment_2`	—
`Improved Rocket Engines` By Blood Alone improved_rocket_engines	1.5	1945	—	—	Equipment: `[object Object]`, `[object Object]` Modules: `rocket_engine_2`	Show Equipment Icon true `rocket_artillery`: Soft Attack +0.05 `rocket_artillery_brigade`: Soft Attack +0.05 `mot_rocket_artillery_brigade`: Soft Attack +0.05 `motorized_rocket_brigade`: Soft Attack +0.05
`Isotope Separation Centrifugal` isotope_separation_centrifugal	5	1943	—	—	—	Sp Nuclear Bomb Speed Factor +0.05 Sp Thermo Nuclear Bomb Speed Factor +0.05 Nuclear Production Factor +0.5
`Lightweight Tank Designs` JAP_lighter_tanks	1	1936	—	—	—	—
`The Silver Wheels` JAP_silver_wheels	1	1936	—	—	—	—
`Jet Engines` jet_engines The development of Jet Engines is an essential prerequisite for the development of jet powered aircraft. This must be researched before you can research advanced aircraft Has a scripted effect on completion.	2	1944	—	—	Modules: `tank_gas_turbine_engine`, `jet_engine_1x`, `jet_engine_2x`, `jet_engine_3x`, `jet_engine_4x`, `jet_engine_6x`	—
`Jungle Heavy Tanks` jungle_heavy_tanks	1	undefined	—	—	—	—
`Jungle Tanks` jungle_tanks	1	undefined	—	—	—	—
`Jungle Training` jungle_training_tech	1	undefined	—	—	—	—
`Jungle Warfare` jungle_warfare	1	undefined	—	—	—	—
`Land Multi Charge Large Caliber Gun Tech` land_multi_charge_large_caliber_gun_tech	undefined	1936	—	—	Buildings: `mega_gun_emplacement` (level 1)	—
`Decryption Bonus` lar_decryption_bonus_tech	1.5	1944	—	—	—	Decryption Power +10
`Long Range Patrol Support Tech` long_range_patrol_support_tech	1	1936	—	—	Units: `long_range_patrol_support`	—
`Lotta Svard Tech` lotta_svard_tech	1	1936	—	—	—	`category_support_battalions`: Max Strength +5 `category_support_battalions`: Max Organisation +10
`Midget Submarine Hull` midget_submarines	1	1936	—	—	Equipment: `ship_hull_midget_submarine`	—
`Militias` militia_tech	undefined	undefined	—	—	Units: `militia`	—
`Modern SP Artillery` modern_art	0.5	1945	—	—	Equipment: `modern_tank_artillery_equipment_1` Units: `modern_sp_artillery_brigade`	—
`Modern SP Anti-Air` modern_spaa	0.5	1945	—	—	Equipment: `modern_tank_aa_equipment_1` Units: `modern_sp_anti_air_brigade`	—
`Modern Tank Destroyer` modern_td	0.5	1945	—	—	Equipment: `modern_tank_destroyer_equipment_1` Units: `modern_tank_destroyer_brigade`	—
`Molotov Cocktails Tech` molotov_cocktails_tech	1	1936	—	—	—	`category_all_infantry`: Hard Attack +0.25 `category_all_infantry`: Ap Attack +1
`Motorized Rocket Artillery` motorized_rocket_unit	1.5	1939	Support Rocket Artillery	—	Equipment: `motorized_rocket_equipment_1` Units: `motorized_rocket_brigade`	—
`Mountain Defensive Training` mountain_defensive_training	1	undefined	—	—	—	—
`Mountain Gun` mountain_gun	1	undefined	—	—	—	—
`Mountain Tanks` mountain_tanks	1	undefined	—	—	—	—
`Mountain Warfare` mountain_warfare	1	undefined	—	—	—	—
$ITA_grande_rivolta_rurale$ mountain_warfare_militias_tech	1	1936	—	—	—	—
`MUN Anti Tank Development Tech` MUN_anti_tank_development_tech	1	undefined	—	—	—	`anti_tank`: Ap Attack +0.05 `anti_tank_brigade`: Ap Attack +0.05 `artillery`: Ap Attack +0.05 `artillery_brigade`: Ap Attack +0.05
`MUN Camo Netting` MUN_camo_netting	1	undefined	—	—	—	—
`MUN CZE Establish Air Defense Zones` MUN_CZE_establish_air_defense_zones	-1	1936	—	—	—	Static Anti Air Hit Chance Factor +0.1
`MUN Horska Artillery` MUN_horska_artillery	1	undefined	—	—	—	—
`MUN Improved Supply Dumps` MUN_improved_supply_dumps	1	undefined	—	—	—	`logistics_company`: Supply Consumption Factor -0.1
`MUN Intergrate Fortification Engineers` MUN_intergrate_fortification_engineers	1	undefined	—	—	—	`engineer`: Entrenchment +0.1
`MUN Merge The Financial And State Guard Tech` MUN_merge_the_financial_and_state_guard_tech	-1	1936	—	—	—	`military_police`: Max Strength +5
`MUN Recon In Force` MUN_recon_in_force	1	undefined	—	—	—	`category_recon`: Max Strength +5 `category_recon`: Recon +0.1
`NOR Rikstanken Tech` NOR_rikstanken_tech Has a scripted effect on completion.	1	1936	—	—	Modules: `NOR_rikstanken_turret`, `NOR_tank_rikstanken_armor`	—
`NORDIC SupportCollaboration Tech` NORDIC_supportCollaboration_tech	undefined	undefined	—	—	—	`category_support_battalions`: Max Organisation +10 `category_support_battalions`: Soft Attack +0.25 `category_support_battalions`: Experience Loss Factor -0.05
`Northern Territory Recon Support Tech` northern_territory_recon_support_tech	1	1936	—	—	Units: `northern_territory_recon_support`	—
`Nuclear Reactor` nuclear_reactor	5	1943	—	—	Buildings: `nuclear_reactor` (level 1)	—
`Heavy Water Nuclear Reactor` nuclear_reactor_heavy_water	5	1943	—	—	Buildings: `nuclear_reactor_heavy_water` (level 1)	—
`Nuclear Bombs` nukes Has a scripted effect on completion.	5	1945	—	—	—	Nuclear Production +0.5
`Panzerschiff` panzerschiffe	1	1936	—	—	Equipment: `ship_hull_cruiser_panzerschiff`	—
`Penal Battalions` penal_infantry	1	1936	—	—	Units: `penal_battalion`	—
`Battalion Combat Teams` PHI_battalion_combat_teams	1	undefined	—	—	—	`category_all_infantry`: Hard Attack +0.15 `category_all_infantry`: Soft Attack +0.15 `category_all_infantry`: Ap Attack +0.15 `category_cavalry`: Hard Attack +0.1 `category_cavalry`: Soft Attack +0.1 `category_cavalry`: Ap Attack +0.1
`Pre-Dreadnought Ships` pre_dreadnoughts	1	1936	—	—	Equipment: `ship_hull_pre_dreadnought`	—
`Radar` radio_detection	1.75	undefined	—	Cavity Magnetron	Buildings: `radar_station` (level 1)	Coordination Bonus +0.01
`Revolutionary Mass Assault` revolutionary_mass_assault	undefined	undefined	—	—	—	Conscription +0.02 `infantry`: Combat Width -0.2
`Rocket Engines` By Blood Alone rocket_engines	2	1944	—	—	Equipment: `[object Object]` Modules: `rocket_engine_1`	Show Equipment Icon true
`Sami Pathfinders Tech` sami_pathfinders_tech	1	1936	—	—	—	`category_recon`: Recon +1
`Super Heavy Battleship` ship_hull_super_heavy	1.5	1936	—	—	Equipment: `ship_hull_super_heavy_1` Modules: `ship_armor_shbb`	—
`Sp Land Large Caliber Kinetic Energy Sabot Gd Tech` sp_land_large_caliber_kinetic_energy_sabot_gd_tech	1	1936	—	—	—	Sp Land Multi Charge Large Caliber Gun Speed Factor +0.1 Experience Gain Artillery Combat Factor +0.1 `artillery_brigade`: Ap Attack +0.15 `artillery`: Ap Attack +0.15 `mot_artillery_brigade`: Ap Attack +0.15 `category_self_propelled_artillery`: Ap Attack +0.15 `super_heavy_artillery`: Ap Attack +0.15 `self_propelled_super_heavy_artillery`: Ap Attack +0.15 `field_guns`: Ap Attack +0.1
`Sp Land Large Caliber Kinetic Energy Sabot No Gd Tech` sp_land_large_caliber_kinetic_energy_sabot_no_gd_tech	1	1936	—	—	—	Experience Gain Artillery Combat Factor +0.1 `artillery_brigade`: Ap Attack +0.15 `artillery`: Ap Attack +0.15 `mot_artillery_brigade`: Ap Attack +0.15 `category_self_propelled_artillery`: Ap Attack +0.15 `field_guns`: Ap Attack +0.1
`Sp Naval Proximity Fuze Tech` sp_naval_proximity_fuze_tech	1	1940	—	—	—	Navy Anti Air Attack Factor +0.15
`Sp Naval Repair Ships Pick A` sp_naval_repair_ships_pick_a	1	1940	—	—	—	Naval Repair Support Value Factor +0.25 Naval Repair Support Factor -0.1
`Sp Naval Repair Ships Pick B` sp_naval_repair_ships_pick_b	1	1940	—	—	—	Naval Repair Support Value Factor +0.05
`Sp Naval Repair Ships Pick C` sp_naval_repair_ships_pick_c	1	1940	—	—	—	Naval Repair Support Factor +0.25 Naval Repair Support Value Factor -0.15
`Sp Naval Support Ships Pick A` sp_naval_support_ships_pick_a	1	1940	—	—	—	Naval General Support Value Factor +0.25 Naval General Support Factor -0.1
`Sp Naval Support Ships Pick B` sp_naval_support_ships_pick_b	1	1940	—	—	—	Naval General Support Value Factor +0.05
`Sp Naval Support Ships Pick C` sp_naval_support_ships_pick_c	1	1940	—	—	—	Naval General Support Factor +0.25 Naval General Support Value Factor -0.15
`Sp Naval Underway Replenishment Pick A` sp_naval_underway_replenishment_pick_a	1	1940	—	—	—	Underway Replenishment Range +0.2 Underway Replenishment Convoy Cost +0.1
`Sp Naval Underway Replenishment Pick B` sp_naval_underway_replenishment_pick_b	1	1940	—	—	—	Underway Replenishment Range -0.1 Underway Replenishment Convoy Cost -0.2
`Stronghold Network Tech` stronghold_network_tech	undefined	1936	—	—	Buildings: `stronghold_network` (level 1)	—
`Sturmtruppe Battalion Tech` sturmtruppe_battalion_tech	1	1936	—	—	Units: `sturmtruppe_battalion`	—
`Suicide Charge` suicide_charge	1.5	1944	—	—	Modules: `fixed_explosive_charge`	—
`Yokosuka MXY7 Ohka` suicide_craft	1.5	1944	—	—	Equipment: `rocket_suicide_equipment_1`	—
`Super Heavy SP Artillery` super_heavy_art	0.5	1943	—	—	Equipment: `super_heavy_tank_artillery_equipment_1` Units: `super_heavy_sp_artillery_brigade`	—
`Super-Heavy SP Anti-Air` super_heavy_spaa	0.5	1943	—	—	Equipment: `super_heavy_tank_aa_equipment_1` Units: `super_heavy_sp_anti_air_brigade`	—
`Super Heavy SP Tank Destroyer` super_heavy_td	0.5	1943	—	—	Equipment: `super_heavy_tank_destroyer_equipment_1` Units: `super_heavy_tank_destroyer_brigade`	—
`Supersonic Fighter` Gotterdammerung supersonic_fighter1	2	1950	—	—	Equipment: `supersonic_fighter_equipment_1`	—
$small_plane_airframe_5$ supersonic_small_airframe	2	1950	—	—	Equipment: `small_plane_airframe_5`	—
`SWE Bofors Antitank Gun` SWE_bofors_antitank_gun	1	undefined	—	—	—	`category_anti_tank`: Hard Attack +0.1 `category_anti_tank`: Ap Attack +0.1 `category_tank_destroyers`: Hard Attack +0.05 `category_tank_destroyers`: Ap Attack +0.05 `category_tank_destroyer_regimental_support`: Hard Attack +0.025 `category_tank_destroyer_regimental_support`: Ap Attack +0.05
`Lynx Armored Car` SWE_lynx_armored_car	1	1942	—	—	Equipment: `[object Object]`	Sub Tech Index +1 `armored_car`: Max Organisation +5 `armored_car`: Ap Attack +0.1 `armored_car`: Hard Attack +0.1 `armored_car_recon`: Max Organisation +3 `armored_car_recon`: Ap Attack +0.1 `armored_car_recon`: Hard Attack +0.1
`SWE Sami Support Tech` SWE_sami_support_tech	1	1936	—	—	—	`category_recon`: Recon +1
$SWI_mountaneer_paratroopers$ SWI_mountaineer_paratroopers_tech	1	undefined	—	—	—	—
`SWI Saint Bernard Tech` SWI_saint_bernard_tech	undefined	undefined	—	—	—	`field_hospital`: Casualty Trickleback +0.1 `field_hospital`: Experience Loss Factor -0.3
`Tech Recon Focus Bonus` tech_recon_focus_bonus	undefined	undefined	—	—	—	`category_recon`: Recon +2
`The Thunder at our Gates` the_thunder_at_our_gates_artillery	undefined	undefined	—	—	—	`artillery_brigade`: Combat Width -0.1
`Thermonuclear Bombs` thermonuclear_bombs	5	1950	—	—	—	Thermonuclear Production +1
`Jungle Pioneers` TOA_jungle_pioneers_support_tech	1	1936	—	—	Units: `jungle_pioneers_support`	—
`Brown Water Navy` ToA_river_boats_tech	1	1936	—	—	—	—
`Torpedo Cruiser` torpedo_cruiser	1	1936	—	—	Equipment: `torpedo_cruiser`	—
`Torpedo Cruiser` torpedo_cruiser_mtg	1	1936	—	—	Equipment: `ship_hull_torpedo_cruiser`	—
`Uranium Tipped Bullets` uranium_tipped_bullets	1	1947	—	—	—	`category_all_infantry`: Hard Attack +0.25 `category_all_infantry`: Ap Attack +1 `category_cavalry`: Hard Attack +0.1 `category_cavalry`: Ap Attack +0.4 `category_artillery`: Hard Attack +1 `category_tank_destroyers`: Hard Attack +0.15 `category_tank_destroyers`: Ap Attack +0.2 `anti_tank`: Hard Attack +0.1 `anti_tank`: Ap Attack +0.2 `mot_anti_tank_brigade`: Hard Attack +0.1 `mot_anti_tank_brigade`: Ap Attack +0.2 `anti_air`: Air Attack +0.1 `mot_anti_air_brigade`: Air Attack +0.1
`Urban Training` urban_training_tech	1	undefined	—	—	—	—
`Winter Logistics Support Tech` winter_logistics_support_tech	1	1936	—	—	Units: `winter_logistics_support`	—