About This Game

A small glowing mushroom wakes up the forest

The forest above is grey and still. Under it, one mushroom starts to glow. Click its cap, make spores, and grow a web of threads down into the dark.

Nine hidden worlds

Dig from the soft Loam through the Rootways, the Clay Beds and the Glow Grotto, down to a drowned lake, a singing geode, the bones of something enormous, and the warm Ember Deep. At the very bottom, the Heartseed sleeps.

Small, strange neighbours

Earthworms, dung beetles, glowworms, cave newts, crystal snails and fire salamanders move in as your web reaches them. Each world adds a new resource and a new way to grow: fireflies to catch, pearl beds to harvest, a geode that sings louder the faster you click, old bones that remember, and a kiln that bakes Heartfire.

Bring the forest back

Revive seven trees, one by one, and watch the dead wood turn green, gold and red. Choose a gift at every cap level. Find 18 curios that the beetles dig up. Bramble, an old toad with a dry, warm humour, keeps you company.

A real ending

Underbloom is a complete game. Your first forest takes about two to two and a half hours. When you wake the Heartseed, the dawn comes and the credits roll. Then you can keep playing, start again, or Replant.

• Mouse, touch screen or gamepad (full Steam Deck controls).
  
• After the ending, an optional Replant: four seasons, each with its own rules.
  
• 29 achievements.
  
• Synth music made for each world, and a heartbeat that grows as you near the end.
  
• In English, French, Spanish, Japanese, Korean, Russian and Simplified Chinese.
  
• No ads, no microtransactions, no timers that ask for money.

AI Generated Content Disclosure

The developers describe how their game uses AI Generated Content like this:

The pixel art (the forest, the creatures, the worlds, the icons and the store images) was generated with ChatGPT image generation and then adapted by hand-written tools to the game's palette and pixel grid. The story, the dialogue and the item texts were written with the help of an AI model (Claude). The game code, including the code that makes the music and sounds at run time, was written with the help of an AI model (Claude). The game generates no AI content while you play.