Open now · Join instantly
Primordaeon playtest
by Philocypher
Tower Defense
Anyone with a Steam account can join, and it's free.
- Access
- Instant
- On playtest since
- Nov 6, 2026
- Planned release
- Coming soon
- Developer
- Philocypher
- Platforms
- Windows, Linux
- Players
- Single-player
- Languages
- English
How to join the Primordaeon playtest
- Open the game's Steam page with the Join playtest button. Sign in to Steam if it asks.
- Use the Primordaeon 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 Primordaeon
Defend against a horde of millions of creatures.
Merge wisps together and place them strategically.
From the game's Steam page.





