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Stellar Initiative

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Stellar Initiative

Five Head Games · Published by Five Head Games · Official site ↗

Mostly Positive — 77% positive (414 reviews) · 14 achievements

Last updated 27 Sept 2026

Stellar Initiative is a roguelike tower defense game where you land on the planet and use your orbit ship to deliver buildings and support you with fire. Complete missions, install new upgrades, discover powerful artifacts, and find the best strategy!

DJCTQ 6

£8.50

Lowest price we've ever recorded

View on Steam

Prices can lag the live Steam store — always confirm before buying.

Price history

3 Sept 2026Lowest: £8.50 · Highest: £8.509 Oct 2026

Strategy · 2024 · More £5 - £15 games

In Stellar Initiative, strategize your way through alien terrains by deploying defensive structures and discovering powerful artifacts. Each mission brings new challenges as you refine your tactics in this roguelike tower defense experience from Five Head Games.

About this game

Stellar Initiative is a roguelike tower defense game where you land on the planet and use your orbit ship to deliver buildings and support you with fire.

Features:

  • Choose next mission: scout for new opportunities, mine more resources, discover rare artefacts, defend the position or prepare to fight the boss!

  • Order buildings: turret to hold the position, walls to stop enemy waves, generators to build up the economy, or any other building to adapt to next enemy attack.

  • Manage resources: balance between delivery duration, buildings cost and available space.

  • Unlock upgrades: choose the path you desire for each building and combine them to fit your play style.

  • Discover artefacts: each one with its own effect can guide your strategy and make every game unique.

Content:

  • 156 unique artifacts

  • 26 different buildings and ship abilities

  • 139 upgrades to install with different paths

  • 12 missions of 6 types and 12 different modifiers

  • 5 difficulties

System Requirements

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Minimum

Minimum:
  • OS *: Windows 7 or newer
  • Processor: 2.5Ghz or better
  • Memory: 2 GB RAM
  • Graphics: Support for OpenGL 3.3
  • Storage: 1 GB available space

Supported Languages

English, French, German, Spanish - Spain, Japanese, Korean, Portuguese - Brazil, Russian, Simplified Chinese

Latest news

  • Patch NotesOfficial

    Update 1.2.1 and Stellar Raiders bundle

    Excited to announce that my next game, Stellar Raiders, is out! {STEAM_CLAN_IMAGE}/44447360/301e5c613881fedaf79d68ee77704e703c716da3.gif It is a roguelike tactics with a lot of artifacts, skills, and perks, so anyone enjoying Stellar Initiative might like it! https://store.steampowered.com/app/3531610/Stellar_Raiders/ With that said, he's a new update for Stellar Initiative, fueled by a Discord community, with special thanks to DemonicTutor! Full patch notes: v1.2.1 - New artifact - kinetic barrier: buildings gain a shield on landing and upgrade - New artifact - radioactive fog: enemies have 25% chance to start with radiation - Nerf radiation, now it stacks only up to 10 stacks - Buff teleportation station, teleport price per tier 100%-100%-100%-80%-50% -> 100%-80%-65%-50%-40% - Nerf transformer, now it converts attacks into energy instead of damage (so only affects attacks with damage 2+) - Buff transformer bottom branch, 2.2 health 20 -> 25, 3.2 heal upgrade price 35 -> 25 - Buff coil bottom branch, 2.2 effect replaced 2x capacity -> coil does not lose all charge on attacks, 3.2 added 2x capacity - Buff shield generators, now they replace wave generators from tier 0 (like flying mortars) - Buff turret bottom branch, 3.2 damage 2 -> 3 but price 30 -> 35 - Buff rocket launcher, reload duration 15-10 -> 14-8 - Buff rocket launcher top branch, 3.1 damage 40 -> 50 - Buff rocket launcher bottom branch, 2.2 upgrade price 35 -> 30 - Buff focus tower top branch, 2.1 range 4 -> 5, 3.1 max damage 15 -> 20 - Buff focus tower bottom branch, 2.2 upgrade price 40 -> 30, 3.2 reload duration 6 -> 4 - Nerf matter generator bottom branch, cycle durations from upgrades 100-70-40 -> 100-75-50 - Buff matter generator top branch, 2.1 delivery 20 -> 15 - Buff laser cannon bottom branch, 2.2 damage 32 -> 64 but price 40 -> 45, 3.2 damage 64 -> 128 (!) but price 70 -> 80 - Buff flamethrower, price 35 -> 30, first upgrade price 30 -> 25, range 1-2 -> 1.5-3 - Nerf impulse, waves delay 20 -> ...
    Read full article on Community Announcements (Five Head Games)
  • Patch NotesOfficial

    Update 1.2

    New station: Flux converter Alternate between two states to take the most out of every situation. Absorption: station generates energy faster while delivery is empty. Radiation: station consumes energy to reduce delivery duration of items. {STEAM_CLAN_IMAGE}/44447360/e0ff227faa503675954df1f9ba70f03ffcf19e98.png Endless mission Fight against the strongest endless waves and survive as long as possible to achieve the best score. {STEAM_CLAN_IMAGE}/44447360/ca7ef29b21d58ea2daa7cc4adff4b904a4aaf92c.png New artifacts 18 new artifacts, including 4 new rare ones with strong and impactful effects. {STEAM_CLAN_IMAGE}/44447360/3a2e5ece05091c2fac6940a78a176e6293b71f07.png Difficulty improvements All enemies and waves were tweaked to achieve better pacing. Overall, the first two waves should feel easier and less punishing, while later waves should come earlier and be more difficult. {STEAM_CLAN_IMAGE}/44447360/b662eb6e137ae4e8cd2910eb5c7e864db28f8f88.png P.S. Also, if you're enjoying the game, please consider leaving a review. It helps small projects like this a lot! Full patch notes: v1.2.0 - New station - Endless mission starting from Captain difficulty - Rebalance missions reducing first waves difficulty and slightly increasing the last ones - Add 18 new artifacts - Add 4 new late-game units - Immortal enemy is now mortal (health inf -> 1000) - Hidden core removed from Corporation pool - Drones price now increased by 5 for each drone created (per drone hub) - Nerf transformer upgrades, 2.1 health 10 -> 8, 4,5 price +1 stellarium - Nerf infinite generators upgrades, price per level 4 -> 5 - Nerf intercalation, energy 2 -> 1 - Buff mortars 2.1, damage 10 -> 12, upgrade price 35 -> 30 - Buff pulsar II, enemies debuff 30%/30% -> 40%/40% - Buff fractal antenna, range 4 -> 5 - Buff hyper-efficient chargers, discount 5 -> 8 - Buff neutron activation, damage 6 -> 10 - Buff nanoelectronics, discount 1 -> 2 - Buff self-assembly, delivery 15 -> 12 - Buff deathray 3.1, price stellarium 4...
    Read full article on Community Announcements (Five Head Games)
  • Patch NotesOfficial

    Update 1.2 preview

    Excited to announce that the next content update 1.2 will be released on October 18! It will feature: - New station - Endless mission - 18 new artifacts - New enemies - Difficulty improvements - And more! {STEAM_CLAN_IMAGE}/44447360/6a6188ff74820b3fc3812f5bd750723c2eeb8bce.gif
    Read full article on Community Announcements (Five Head Games)
  • Patch NotesOfficial

    Update 1.1

    New ship: Corporation Equipped with a Transformer, Drone Hub, and Emitter. {STEAM_CLAN_IMAGE}/44447360/b02852d26e76094453fcb52e918a3a5fa8472bc5.png Transformer. A cheap building that can't attack enemies, but converts all incoming damage into energy, significantly speeding up the early economy. {STEAM_CLAN_IMAGE}/44447360/741426af82bdac91ffaec104d78f4b8af3cf7286.png Drone Hub. This unique building requires energy to create drones, but they are capable of causing huge accumulated damage at a long distance. {STEAM_CLAN_IMAGE}/44447360/153108c1ce31f7a6effd5422f0f6d47a5bd7dd2e.png Emitter. Deals damage to all enemies around it, giving no chance to the hordes that will come too close. {STEAM_CLAN_IMAGE}/44447360/0dbef388afec797cc9e56818cb2c4ce6949c36d5.png New building to unlock after the first boss: Flamethrower Expensive, but when it heats up to the maximum, enemies melt before reaching the defenses. {STEAM_CLAN_IMAGE}/44447360/7630306840bd972c6ace52b2f58932458a69770b.png New ship effect to unlock after the first boss: Impulse Seize the initiative by gaining extra time between waves and bonus energy. {STEAM_CLAN_IMAGE}/44447360/c59926fcd01dc34946ff1328df29dbcacf212415.png Fast start option If you have discovered enough artifacts and reached the first boss last run, you will be able to skip the first 2 missions, without losing any rewards. {STEAM_CLAN_IMAGE}/44447360/59c30f75bfa8cfbe55fcfbb79f3a28a49ab9a9fa.png Teleport station buff Now it scales better, reducing teleportation prices on higher tiers. Full patch notes: v1.1.0 - New ship loadout - New building: flamethrower - New ship effect: impulse - Fast start option - Buff teleport, T2 cooldown 0.2 -> 0.25, T3 overheat 4 -> 3, T4 teleportation price 100% -> 80%, T5 teleportation price 100% -> 50% - Construction pods artifact is affected by wall mastery - Increase drill min distance to ore 0.15 -> 0.25 - Reduce laser delivery duration 10 -> 5 - Swap space and tab as hotkeys for pause and speed up - Show delivery boost ...
    Read full article on Community Announcements (Five Head Games)
  • Patch NotesOfficial

    Update 1.1 preview

    Excited to announce that the first content update 1.1 will be released on July 29! It will feature: - New ship loadout - 5 new buildings / ship effects - 22 new artifacts - 35 new upgrades to install - And more! {STEAM_CLAN_IMAGE}/44447360/483b95577758e08a61065f98f36ad9f3a52c2336.gif
    Read full article on Community Announcements (Five Head Games)

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