Open now · Join instantly
The Lost Grotto playtest
by Mystic Theory
A roguelite of light and alchemy. Every step down the grotto burns torch fuel. Gather, brew, and read the creatures below to get past them, then use what you've learned to make new discoveries.
Anyone with a Steam account can join, and it's free.
- Access
- Instant
- On playtest since
- Oct 29, 2026
- Planned release
- To be announced
- Developer
- Mystic Theory
- Platforms
- Windows, macOS
- Players
- Single-player
- Languages
- English
How to join the The Lost Grotto playtest
- Open the game's Steam page with the Join playtest button. Sign in to Steam if it asks.
- Use the The Lost Grotto playtest signup there. You're in straight away, with nothing to pay.
- The playtest shows up in your Steam library, ready to install and play.
New to playtests? How Steam playtests work
About The Lost Grotto
Your torch burns with every step.
You're a scholar sent under the Queen's seal to map a grotto that someone else called home first. Their tools are still here. Their handwriting is still on the walls. They left recently enough that the cave hasn't forgotten them.
When the flame goes out, the run ends and you climb back to the city, but only what you learned in the Grotto comes out with you. Learn what ingredients brew together to form powerful combinations and keep your flame aglow.
What you'll do down there:
- Gather what the grotto offers — ore, moss, fungus, strange things in the water
- Brew potions at the Alembic Table, where every combination makes something (experimentation is key here)
- Meet Vorn, who tends locked doors and will trade you passage for the right goods
- Read the old tongue, one word at a time, and start to understand who lived here
- Build up the city between runs under the Queen's watchful eye
The Grotto rewards those who take their time and think carefully about their next moves.
From the game's Steam page.
