Turn the battlefield into your weapon. In this side-view wave-survival roguelite you aim every spell yourself: soak the ground and electrify it, freeze it into ice, or melt the earth into lava. Master five elements, unlock new spells between waves and hold the line across four biomes.
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Match strength key:80+65+50+<50Crystallcaller
SteamAbout Crystallcaller
Theos is a 2D wave-survival roguelite seen from the side. No auto-attack: you aim every spell yourself — with the mouse or the right stick — while trolls, werewolves, snakes and bats close in.

Five elements, one wand
Choose your starting element — Fire, Water, Ice, Lightning or Earth. Each plays differently: fire burns, water pushes back, ice slows and freezes, lightning chains between enemies, earth hits hard after a charge. Between waves you spend coins in your spellbook to unlock 15 spells across all five elements.
Spells that change the battlefield
Missed shots aren't wasted. Water leaves the ground soaked — hit the puddle with lightning and every enemy standing in it gets shocked. Freeze it into a sheet of ice, melt the earth into lava, or turn it into a magnetic field. Put a second spell in your off-hand slot and it empowers your main spell directly.

Every wave a decision
Pick a bonus after each wave, level up to open new spell slots and choose what to unlock next. When you fall, crystal shards carry over into permanent upgrades for your next run.
A journey, not an endless grind
20 hand-built waves across four biomes — meadow, forest, mountains and ice fields — with boss fights along the way and an endless mode for those who want more.

Features
Free demo: waves 1–7, from the meadow into the forest.
Steam data © 2026 Valve Corporation. Trademarks are property of their respective owners.
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