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Bunker Buster
Dig deep and build a self-sufficient bunker. Manage power and life support, then arm it with billions of possible weapon, defence, and cyber-warfare combinations, and strike first, or defend.

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Features
Single-player
Online PvP
Family Sharing
Profile Features Limited 
Languages:
Interface Full Audio Subtitles
English ✔
French ✔
Italian ✔
German ✔
Spanish - Spain ✔
Arabic ✔
Dutch ✔
Japanese ✔
Polish ✔
Portuguese - Portugal ✔
Russian ✔
Simplified Chinese ✔
See all 12 supported languages
Content
Includes Interactive Elements

Online interactivity

Coming Soon To Early Access

The developers of this game intend to release as a work in progress, developing with the feedback of players.

Note: Games in Early Access are not complete and may or may not change further. If you are not excited to play this game in its current state, then you should wait to see if the game progresses further in development. Learn more

What the developers have to say:

Why Early Access?

“Bunker Buster is playable and fun right now, but we want to build it with the community. Early Access lets real players tell us what's working, what needs balance, and what features would make the game even better. Your feedback directly shapes what gets built next.”

Approximately how long will this game be in Early Access?

“We estimate around 6 to 12 months, depending on community feedback and the scope of improvements we want to make before a full release.”

How is the full version planned to differ from the Early Access version?

“We plan to expand the game significantly based on player feedback. Areas we're looking to develop include additional enemy factions and captured weapons, more room types and bunker systems, a campaign or progression mode, deeper tech tree branches, balance improvements across all weapon and defence systems, and additional multiplayer features. The core base-building and combat experience is already in place, the full version aims to broaden and deepen everything around it.”

What is the current state of the Early Access version?

“The game is fully playable with complete base-building, real-time tactical combat, ten enemy factions each with unique capturable weapons, a research and upgrade system, life support simulation, and Steam multiplayer including fortress raiding and PvP quickmatch. Some systems may still need balance tuning and there may be bugs, that's exactly why we're in Early Access.”

Will the game be priced differently during and after Early Access?

“We plan to increase the price when we leave Early Access, as the game will have grown significantly in content and scope. Players who support development early will get the best price.”

How are you planning on involving the Community in your development process?

“We'll be actively monitoring Steam discussions and community feedback to guide what we work on. Players can report bugs, suggest features, and vote on priorities. We plan to post regular updates describing what changed and why, so the community can see their input having a direct impact on the game.”
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About This Game

DIG. BUILD. DESTROY.
Bunker Buster is a tactical underground base-builder with real-time combat. Excavate a hidden fortress beneath the earth, power it, staff it, arm it, then defend it against relentless enemy factions or take the battle to them.

BUILD YOUR BUNKER
Construct a fully self-sufficient underground fortress room by room. Manage power, air, water, food, sanitation, and morale while preparing for war.

  • Infrastructure — Generators, storage depots, cooling loops, exhaust vents

  • Life Support — Air intakes, scrubbers, water pumps, kitchens, med bays

  • Weapons — Missile silos, artillery, mortar pits, EMP cannons, drone hives, mech hangars

  • Defences — SAM sites, AA flak, Trophy active-protection systems, armour plating

  • Surface Installations — Watchtowers, radar domes, HESCO walls, camo netting

  • Intelligence — Radio intercept, seismic arrays, signal jammers

SYNTHESIZE YOUR ARSENAL — BILLIONS OF COMBINATIONS
Every weapon, defence, and daemon is built piece by piece, not picked off a shelf.

  • Ammo Synthesis — Stack up to 25 stat modifiers across 6 weapon platforms. Order changes the outcome: the same components in a different sequence fire differently.

  • Defence Synth — Layer 10 intercept modifiers across SAM, AA Flak, and Trophy systems to counter incoming fire before it lands.

  • Cyber Warfare Suite — Engineer daemons from 15 code modifiers and conditional triggers, or stack 10+ firewall layers into an unbreakable defence grid.

Combined, these systems give you billions of viable loadouts — no two bunkers, and no two battles, play the same.

GO TO WAR
Fight across a tactical No Man's Land in real time. Target enemy rooms, intercept incoming strikes, and deploy your full arsenal.

  • Launch ICBMs from buried silos

  • Deploy combat mechs to hold the line

  • Scramble drone swarms for recon and assault

  • Fire precision artillery or suppress with mortar fire

  • Breach enemy systems with your own synthesized cyberweapons

CONQUER FACTIONS. CLAIM THEIR WEAPONS.
Ten enemy factions each bring unique tactics. Defeat them and capture their technology for your own arsenal, including burrowing Mole Torpedoes, orbital kinetic rods, signal jammers, and more.

MULTIPLAYER / RAID ENEMY FORTRESSES
Build your fortress, then raid other players' bunkers via Steam. Challenge friends directly or find opponents through the quickmatch queue.

KEY FEATURES

  • Deep base-building with power, air, water, and morale simulation

  • Billions of weapon, defence, and cyber-warfare combinations via three full synthesis systems

  • Real-time tactical combat with dozens of weapon systems

  • 10 enemy factions each with capturable unique weapons

  • Research tree spanning 75 technologies across 7 doctrinal branches

  • Steam multiplayer, fortress raiding, and PvP battles

  • Retro pixel art with phosphor-green military UI

AI Generated Content Disclosure

The developers describe how their game uses AI Generated Content like this:

AI tools were used to generate store page capsule images, trailers, and Videos.

System Requirements

    Minimum:
    • OS: Windows 10 64-bit
    • Processor: Dual-core 2.0 GHz (Intel Core i3 / AMD equivalent)
    • Memory: 4 GB RAM
    • Graphics: Integrated graphics, Intel HD 4000 or equivalent
    • DirectX: Version 11
    • Storage: 500 MB available space
    • Sound Card: DirectX compatible
    • VR Support: Not supported
    Recommended:
    • OS: Windows 10/11 64-bit
    • Processor: Quad-core 2.5 GHz+ (Intel Core i5 / AMD Ryzen 5)
    • Memory: 8 GB RAM
    • Graphics: Integrated graphics, Intel UHD 620 or equivalent
    • DirectX: Version 11
    • Storage: 1 GB available space
    • Sound Card: DirectX compatible
    • VR Support: Not supported
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