Fungrow

It starts with one Cremini and a forest floor. It ends when the counter hits zero.
Fungrow is an idle sim about decay. Mycelium rots the world into deadwood, and your mushrooms digest it into spores. Spend the spores to grow more of both. Keep the supply chain balanced and watch 100,000,000,000 tonnes of living biomass tick down to nothing.
Forage by Hand
Click the forest floor to scrape up deadwood for your first hungry mushroom. Every handful counts until the mycelium takes over.
Balance the Supply Chain
Mycelium rots the world, and mushrooms eat what it leaves behind. With too little mycelium your mushrooms starve and go grey. With too few mushrooms the deadwood piles up and goes to waste. The supply chain panel always shows your bottleneck and how to fix it.
Grow 15 Species
Start with humble Cremini, Enoki and Oyster, then work up through Porcini, Morel and Pixie Caps to the deadly ones: Fly Agaric, Jack O Lantern, Funeral Bell, Death Trumpet and the Destroying Angel. Each new species digests more and yields richer spores. Ownership milestones double capacity, and Adaptations evolve every species into stronger forms.
Spread the Mycelium
Six tiers of rot, from thread-thin Hyphae through Fairy Rings and the Wood Wide Web, all the way up to a Spore Cloud that rots the sky itself.
Unleash Blights
Poisonous species brew toxin as they digest. Spend it on Spore Burst and Bloom Frenzy, or drop a Blight Bomb to rot a huge piece of the world in an instant. Unlock Auto Blight and they cast themselves.
Ascend Through Three Branching Skill Trees
Ascend to turn your spores into Essence, then shape your build:
Rot: richer spores and denser gills

Spread: faster mycelium, stronger foraging and better offline growth

Blight: more toxin, faster cooldowns and stronger blights

Each tree forks into a choice you have to commit to, such as Gourmet or Commons, or Pandemic or Virulence. Each one ends in a capstone. Respec any time for free, and pour leftover Essence into upgrades that never cap.
Consume the World, Then the Next One
Rot every tonne and the world is yours, along with a victory screen, your completion time, a place on the Steam leaderboard and double Essence. Then move on to a new world with 100 times the biomass. The decay never has to end.
Features
15 mushroom species, all hand-drawn pixel art

6 tiers of mycelium and a supply chain to balance

3 branching skill trees with choice forks, capstones and upgrades that never cap

Toxin and 3 blights, plus Auto Blight

Endless worlds after the first

Offline growth that keeps rotting while you’re away

21 Steam achievements, a fastest-world leaderboard and Steam Cloud saves

Volume, display, resolution and number-format settings

Rot the world. Then rot it again.