We are thrilled to announce that Valve has completed its compatibility check, and "ULTRA0" is fully verified. You can now enjoy the complete gaming experience seamlessly on your handheld device. To all Steam Deck owners out there: grab your Deck and dive into
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Ultra0 is a visual novel video game developed by GCM, released on 2 June 2026 on PC.
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Enjoy a simple, easy-to-play pseudo-3D shooter! Upgrade your character with power-ups and take down the approaching monsters before they reach you.
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