A star that keeps losing heat. There is no attack button — crashing into other stars is your attack, your healing, your movement, and your exploration. Devour heat, grow heavier, and reach the galactic core before the heat death of the universe catches you.
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HOSHIKUI
SteamAbout HOSHIKUI
Heat is your HP, your fuel, and your timer. You are a dying star drifting through an infinite procedurally generated galaxy. Every second you cool. The only way to survive is to slam into other stars and steal their heat. There is no attack button. Collision is everything — it damages, it heals, it propels, it feeds your growth.
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Mass growth — Absorb stars to gain mass. The heavier you are, the bigger the prey you can swallow. But mass makes you cool faster and drags you into the gravity of giants.
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Elemental decay — Your composition shifts as your heat drains: Hydrogen → Helium → Carbon → Silicon → Iron. You can literally read your remaining lifespan off your own body, and each element changes your stats.
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The heat death front — A cooling front expands from the origin and never stops. Standing still is death. Keep moving outward.
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34 celestial bodies — Gas giants you can hide inside, ice grains that trade heat for mass, pulsars, white dwarfs, and black holes whose event horizon means instant death.
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Roguelite builds — 10 in-run upgrades, plus a permanent research lab between runs.
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Everything is procedural — Every pixel of art and every sound effect is generated in code. No external image or audio assets.
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