Descend, SMUSH, and Survive: UnderMire's Demo Lets You Turn Hairspray and Frogspawn into Spooky Mayhem

   

Tools, Terrain, and the Flow of a Run

Each run begins in familiar spaces that quickly go off the rails. You start in office and home-like rooms, then descend through twisted corridors into wilder biomes such as an underground garden and ultimately toward a dark magic nexus. The bunker literally changes with each attempt, which keeps routes, hazards, and encounters feeling fresh.

Players choose from characters who each carry a magical tool. These tools are described as quirky, powerful, and a little unpredictable, which makes them central to how a character plays. That emphasis on personality means your build decisions hinge on tools as much as on items you SMUSH together.

UnderMire mixes exploration with objectives. You will gather loot, complete tasks from a cantankerous spirit cat named McClane, and juggle short term survival against longer term progression when you return to the Den between runs.

   

SMUSH Crafting, Hazards, and the Fear Gauge

The demo leans hard into improvisation. The game's signature SMUSH system encourages experimentation by combining everyday junk and bizarre ingredients into elemental weapons and potions. Think cell phone batteries, hairspray cans, or even frogspawn sandwiches as raw materials. The combinations are meant to surprise and adapt to whatever threats the bunker throws at you.

Environmental systems play with those experiments. Breakable power, lighting, and elemental interactions mean you can electrify puddles of water or burn wooden obstacles to open new paths or turn hazards into tools. That unpredictability extends to enemies and events. Fearmongers are manifestations of fear itself and fights can change depending on how high your fear gauge climbs. Let fear spiral and you risk hallucinations or even spawning new nightmares into the run.

Bosses and encounters scale with depth, so the bunker rewards steady learning and clever improvisation. The Den functions as a safe, spooky-cozy hub where you can upgrade characters and uncover the bunker's history between runs.

   

Co-op Chaos, McClane, and Why the Demo Matters

UnderMire supports 1-4 player online co-op with proximity voice chat, which promises both immersive teamwork and moments of glorious noise. The social design encourages split-second coordination when manipulating bunker systems or combining item effects, and it also opens the door for accidental brilliance when experiments explode in the best possible way.

McClane, the thousand-year-old spirit cat, offers oddball quests that pull players deeper into the bunker's lore and give direction to runs beyond pure survival. The demo highlights those hooks, the core SMUSH loop, and the fragile balance of exploration, fear management, and co-op mayhem.

If you like first person roguelites that reward curiosity, improvisation, and a willingness to weaponize junk, UnderMire's demo is an intriguing first taste of a system built around creative chaos.

 

The UnderMire Demo is available now on Steam, letting you descend a hand-drawn magical bunker, explore wild biomes, master magical tools, manage your fear gauge, fight spooky enemies, and SMUSH through chaotic co-op.