Free games like Zet Zillions
Below are 8 free-to-play Steam games similar to Zet Zillions, ranked by player overlap and content similarity. No purchase or Steam login required to view the list. Every pick is a full free-to-play title — not a demo, trial, or time-limited giveaway. imho.run's catalogue refreshes daily, so newly free or newly popular titles surface here without manual editing.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like Zet Zillions page.
Ranked picks
- 1

Morimens
Free-to-play alternative to Zet Zillions — no purchase or trial window. Shares Strategy with Zet Zillions.
Morimens is a roguelite card-building game inspired by the Cthulhu mythos, where you craft a versatile and intricate deck tailored to your playstyle. The choice is yours to embark on a climb up treacherous towers or engage in tactical battles. Explore misty maps and uncover the truth of the world.
- 2

Die in the Dungeon: Origins
Free-to-play alternative to Zet Zillions — no purchase or trial window. Shares Strategy with Zet Zillions.
Fight your way through a mysterious dungeon in this deck-building, turn-based roguelike game where you don't use cards, but DICE! Deal with enemies by combining dice on your board, boost their effects with magical relics, and discover the story behind Die in the Dungeon!
- 3

Once Upon a Galaxy
Free-to-play alternative to Zet Zillions — no purchase or trial window. Shares Strategy with Zet Zillions.
ONCE UPON A GALAXY is an easy to learn Card Battler with incredible strategic depth and near infinite fun! Which of your favorite characters from myth and fairy tale will you choose?
- 4

GWENT: The Witcher Card Game
Free-to-play alternative to Zet Zillions — no purchase or trial window. Shares Strategy with Zet Zillions.
Command mighty Witcher-world heroes in epic online PvP card battles!
- 5

Prismata
Free-to-play alternative to Zet Zillions — no purchase or trial window. Shares Strategy with Zet Zillions.
A perfect-information strategy game inspired by RTS, deckbuilders, and board games. Choose from three distinct technology classes and outwit your foes by snowballing your starting resources into a powerful cybernetic army. ABSOLUTELY NO PAY-TO-WIN.
- 6

Star Realms
Free-to-play alternative to Zet Zillions — no purchase or trial window. Shares Strategy with Zet Zillions.
Star Realms is a hugely popular space combat deckbuilding game. Download and play today (note: base set is required to play online) to find out why Star Realms is the winner of SXSW 2014 Board Game of the Year, 7 Golden Geek Awards from BoardGameGeek, and 2 Dice Tower awards!
- 7

Mythgard
Free-to-play alternative to Zet Zillions — no purchase or trial window. Shares Strategy with Zet Zillions.
Welcome to Mythgard, a fantasy cyberpunk CCG of heroes, gods, and mythical beasts. Master the unique lane and mana systems in your rise to the top or enjoy team play with a friend. New players can use the code WelcomeChallenger to get 20 free packs and more to start their journey.
- 8

Sunrider: Mask of Arcadius
Free-to-play alternative to Zet Zillions — no purchase or trial window. Shares Strategy with Zet Zillions.
As Captain Kayto Shields, embark on a galactic voyage of heroism and survival. With his home world destroyed and his nation conquered, the inexperienced Captain Shields, and his newly minted vessel, the Sunrider, are left as the only hope against a galactic evil intent on subjugating all sentient life.