Free games like ESTRO Quantum
Below are 12 free-to-play Steam games similar to ESTRO Quantum, 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 ESTRO Quantum page.
Ranked picks
- 1
Indigo Park: Chapter 1
Free-to-play alternative to ESTRO Quantum — no purchase or trial window. Shares Indie with ESTRO Quantum.
Explore the abandoned childhood wonder of Indigo Park! Guided by Rambley the Raccoon, help restore power to the destroyed amusement park while you run from the reason it shut down.
- 2
The Lab
Free-to-play alternative to ESTRO Quantum — no purchase or trial window.
Welcome to The Lab, a compilation of Valve’s room-scale VR experiments set in a pocket universe within Aperture Science. Fix a robot, defend a castle, adopt a mechanical dog, and more. Still not sold? It’s free!
- 3
Control, I'm Not Coming Back
Free-to-play alternative to ESTRO Quantum — no purchase or trial window. Shares Indie with ESTRO Quantum.
Control, I'm Not Coming Back is a short and emotional narrative game about a lost astronaut searching for a reason to keep going forward while facing the emptiness of space. Inspired by the Hopecore aesthetic, it’s a story about positivism, friendship and our human connection with Voyager 1.
- 4
Landfall Archives
Free-to-play alternative to ESTRO Quantum — no purchase or trial window. Shares Strategy and Indie with ESTRO Quantum.
Break into the Landfall Archives to steal and play previously unreleased games, demos, interactive slide shows, and even an unreleased version of Totally Accurate Battle Simulator from 2017!
- 5
SuchArt: Creative Space
Free-to-play alternative to ESTRO Quantum — no purchase or trial window. Shares Indie with ESTRO Quantum.
Paint on any surfaces with numerous tools in Creative Space — a free sandbox version of SuchArt: Genius Artist Simulator. Create masterpieces, complete commissions, and decorate your studio in the most advanced artist sim!
- 6
Electoral Carnage
Free-to-play alternative to ESTRO Quantum — no purchase or trial window. Shares Early Access with ESTRO Quantum.
Electoral Carnage is an absurd 2D fighting game featuring America's most famous (and infamous) politicians. If you don't download it you hate America. Also JFK can assassinate himself. What more do you need to know?
- 7
Aircar
Free-to-play alternative to ESTRO Quantum — no purchase or trial window. Shares Indie with ESTRO Quantum.
A simple immersive flying game built for VR. Pilot an aircar through a futuristic cityscape.
- 8
Die in the Dungeon: Origins
Free-to-play alternative to ESTRO Quantum — no purchase or trial window. Shares Strategy and Indie with ESTRO Quantum.
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!
- 9
Hackagon: Cyber Card Battler
Free-to-play alternative to ESTRO Quantum — no purchase or trial window. Shares Strategy and Indie with ESTRO Quantum.
HACKAGON is a fast 1v1 cyber card battler. Breach the network with the red team or defend it with the blue team. Cards are played face-down and revealed at the same time, so victory comes from reading your opponent, not moving first. Build your 12-card deck, claim the areas, and take the network.
- 10
Chrono CCG
Free-to-play alternative to ESTRO Quantum — no purchase or trial window. Shares Strategy and Indie with ESTRO Quantum.
Chrono CCG is an indie game from genre veterans where time-traveling agents battle for control of history. Timelines shift mid-match, agents evolve, and deep strategy meets accessible play. For the community, by the community.
- 11
MechaCorps Draft
Free-to-play alternative to ESTRO Quantum — no purchase or trial window. Shares Strategy with ESTRO Quantum.
Outdraft your enemies in a simultaneous competitive card game with no wasted picks. Claim critical parts, deny key resources, and assemble ruthless Mechs. Prove your strategy in a decisive auto-battle. Quick PvP. Free to play. Never pay-to-win.
- 12
Xeno Strike
Free-to-play alternative to ESTRO Quantum — no purchase or trial window. Shares Strategy and Indie with ESTRO Quantum.
Build your collection, construct decks, and duel against other players in a sci-fi card battler.