Somnivium game cover

Somnivium CD Key

You’re a night-shift worker sucked into a mysterious digital world. Somnivium is a roguelike deckbuilder: collect 30+ cards, build your deck, and fight turn-based battles. Fusion any two cards into a new Fusion Card with AI-generated art, shaping your strategy.
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Current Lowest Price

FREE
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Release Date

12 Mar, 2026

Publisher/Developer

Freeman, Yolozero

Reviews

Steam: 100.00% positive (2/2)
Metacritic: -

Somnivium Steam Price History Chart

Current Steam price: FREE
Lowest Steam price ever: FREE — 2026-10-19
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Somnivium description

Somnivium

Somnivium is a Roguelike Deckbuilding game where strategy meets limitless creativity. You are a tired company employee who finishes a late shift and, while casually playing a video game, is suddenly pulled into the digital world. Your goal is to uncover why you were trapped and to navigate a mysterious realm that reacts to your choices.

Core Gameplay

  • Strategic Deckbuilding: Build your ultimate deck from over 30 unique cards. Each card has an energy cost you must manage each turn, and you must balance attack power with defense to push through waves of monsters.
  • AI Card Fusion System: The core mechanic of Somnivium. Fuse any two cards to create a brand-new Fusion Card. Local AI generates a unique illustration for fused cards in real time, adding a personal, evolving gallery to your deck. Rendering time depends on hardware, so on older PCs you may want to limit AI use on the Fusion screen for smoother gameplay.
  • Turn-Based Battles: Engage tactical, turn-based skirmishes against a variety of foes, from Slimes to Skeletons. Every decision matters—draw the right cards, time your abilities, and manage your resources to survive each encounter.

Experience and Depth

The game emphasizes creative experimentation and strategic planning. Each run invites you to explore new card combinations and fusion outcomes, unlocking different ways to approach combat. The fusion mechanic invites surprising synergies; your deck evolves as you experiment with how cards interact, creating powerful, unexpected effects on the battlefield.

Atmosphere and Setting

Set inside a mysterious digital world, Somnivium blends a late-night mood with inventive mechanics. The environment responds to your deck choices and fusion creations, offering a unique playground where your decisions shape both strategy and visuals in real time.

Accessibility and Scope

Somnivium is designed as a compact, standalone experience that fits into short play sessions while offering depth for longer sessions alike. It presents a bold take on the roguelike deckbuilding genre, encouraging experimentation and thoughtful planning with every run.

Indie Creation

Assuring a fresh, experimental feel, Somnivium was created in a short development window by two novice developers. The result is a distinctive blend of strategic design and dynamic art generation that invites players to dive in and explore its unusual mechanics.