Steam Playtests
Constelleum

Open now · By request

Constelleum playtest

by Constelleum Games LLC

Welcome to Constelleum, the team vs team cosmic fantasy card battler. Pick from characters with distinct styles and mechanics. Play cards to move, disrupt opponents, summon companions, and more. Coordinate with your teammates to drive points to the opposing goal and claim victory.

It's free to ask. The developer chooses who gets in.

Access
By request
On playtest since
Apr 24, 2026
Planned release
Coming soon
Developer
Constelleum Games LLC
Platforms
Windows
Players
Co-op, Multiplayer, Online co-op, Online PvP, PvP, Single-player
Languages
English

How to join the Constelleum playtest

  1. Open the game's Steam page with the Request access button. Sign in to Steam if it asks.
  2. Request access to the Constelleum playtest there. It's free and doesn't commit you to anything.
  3. The developer lets players in, often in batches, so it can take a while. Steam emails you when you're in, and the playtest appears in your library.

New to playtests? How Steam playtests work

About Constelleum

Constelleum is a multiplayer card-driven tactics game with accessibility at its heart.

Welcome to Constelleum, the team vs team cosmic fantasy card battler. Pick from characters with distinct styles and mechanics. Play cards to move, disrupt opponents, summon companions, and more. Coordinate with your teammates to drive points to the opposing goal and claim victory.

We made Constelleum accessible from design through development

  • Constelleum integrates turn-based tactics (think Gloomhaven), the asymmetric characters of MOBAs, and deck building into a low-input and competitive experience
  • Strategize against another team in online versus multiplayer for deep, emergent gameplay
  • Join friends in a cooperative roguelite to outwit encounters, forge a path, and explore the World Beasts
  • Work together to perform exciting combos
  • 8 playable characters with their own mechanics and resources
  • Expansive card libraries unique to each character
  • Innovative mechanics offer a rich new way to build decks
  • Multiple immersive World Beasts to explore
  • Dozens of status effects

From the game's Steam page.