62%Good matchVoidigo
97%3k97% positive reviews, Overwhelmingly Positive across 3k reviews·Action Roguelike · Twin Stick Shooter
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Iosis is an occult space defense roguelike which offers a large palette of tools for crafting unique play styles. It features close-up combat with the motto "damage is momentum". Grow stronger as you devote to alchemical paths, collect talismans and spells to master sacrifice, manipulation and more.
Iosis
Steam
In Iosis, you control the Silver Guard, which protects the base from waves of corrupted metals with collisions. The main source of damage is momentum; the faster you are, the harder you hit. You can die and respawn in combat as long as your base is intact. As you progress through fast-paced runs, you will build your play style according to several aspects such as mobility, self-sacrifice, manipulation and control.

Iosis is inspired from bullet hell and tower defense genres with a special emphasis on customizable runs that allow unique builds. Dying as the Silver Guard is only a temporary setback which unlocks builds that depend on self-damage and unleashes devastating power.



Iosis is inspired from occult alchemy themes where the main goal is to stop the corruption of Aleno and achieve purification through the four stages of alchemy: Nigredo, Albedo, Citrinitas, Rubedo. Protect the base which bears the Philosopher's Stone and undo the corruption that holds captive all metals.
Steam data © 2026 Valve Corporation. Trademarks are property of their respective owners.
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