Hearts of War — Grand Strategy Template (100% Blueprint)

Build your own Hearts of Iron–style grand strategy game in Unreal Engine 5. Hearts of War is a complete, playable WW2 grand strategy template. It covers the full core loop: map, economy, research, army, combat, diplomacy and AI. Everything is built in Blueprint and driven by DataTables, so you can add countries, technologies, national focuses, events, units and sounds without writing code or touching a single Blueprint.

TRAILER: https://youtu.be/qmlfwGp2Uw4
DISCORD: https://discord.gg/AH3PDCtKwy

GAMEPLAY GUIDE : https://drive.google.com/file/d/15q9gspU6O1HN4vbN0I-mGHr8BO_3m7Nk/view?usp=sharing
DEVELOPER DOCUMENTATION : https://drive.google.com/file/d/1ZptArqhsqYlpJYRV5ttxg8XdVx2_AxDk/view?usp=sharing

Features

• Province map: 1,940 provinces, 350 states and 32 playable European nations (1936 start), with 11 map modes, borders, occupation stripes and A* pathfinding.

• Economy: civilian and military factories, a construction queue, production lines with efficiency growth, six strategic resources and automatic trade.

• Research: 73 technologies in 9 tabbed trees, with prerequisites and an ahead-of-time penalty.

• National focus trees: 85 focuses, 7 country-specific trees plus a generic one.

• Politics: laws (economy, conscription, trade), advisors, national spirits, stability, war support and political power.

• Army: a division designer, templates, training, equipment stockpiles, entrenchment, planning and reinforcement.

• Combat: HOI-style battles with soft/hard attack, defence/breakthrough, armour vs piercing, terrain, rivers, combat width, air superiority, retreat and encirclement.

• Diplomacy: war goal justification, war declarations, factions, guarantees, world tension and capitulation by victory points.

• AI: builds its economy, researches, picks focuses, trains armies, justifies wars and fights them.

• Events and decisions: a generic effect/condition system with 34 effect types and 29 condition types.

• Interface: a full HOI-inspired UI with main menu, country selection, HUD, 9 panels, event popups, notifications, and unit-type icons on division counters and battle markers.

• Save system: save/load plus a monthly autosave.

• Audio: original, royalty-free music (3 tracks) and 12 sound effects, all managed from a DataTable.

• Performance: time-budgeted simulation that runs about 9 game days per second at max speed.

• Documentation: a developer guide (27 pages) and a gameplay guide (13 pages).