Single-player games like ESTRO Quantum
Below are 8 single-player Steam games similar to ESTRO Quantum, ranked by player overlap. Every pick carries Steam's Single-player category, so multiplayer-only titles or always-online games don't sneak in. imho.run pulls the category data from Steam directly — Single-player here matches what the store labels.
Want the full alternatives list (paid + free + Steam Deck + cheaper picks)? See the parent games like ESTRO Quantum page.
Ranked picks
- 1
Hackagon: Cyber Card Battler
Single-player alternative to ESTRO Quantum — playable solo, no multiplayer required. 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.
- 2
Neon Blackfall
Single-player alternative to ESTRO Quantum — playable solo, no multiplayer required. Shares Strategy and Indie with ESTRO Quantum.
Build your deck, survive the Blackout, and fight for control of Neurovale. A fast-paced card game with 50+ single-player chapters and online multiplayer battles. Lead one of four rival factions and adapt as the city changes between the Neon and Blackfall eras.
- 3
Chrono CCG
Single-player alternative to ESTRO Quantum — playable solo, no multiplayer required. 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.
- 4
Gridholm
Single-player alternative to ESTRO Quantum — playable solo, no multiplayer required. Shares Strategy and Indie with ESTRO Quantum.
A tactical card battler where positioning wins games. Deploy cards on a 5x5 grid, move them like chess pieces, and control the throne. Use terrain and cast powerful spells. 200+ cards across four factions. Play Roguelike Deckbuilder, Draft, or Ranked Multiplayer. Think-to-win never pay-to-win.
- 5
MechaCorps Draft
Single-player alternative to ESTRO Quantum — playable solo, no multiplayer required. 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.
- 6
Duelyst
Single-player alternative to ESTRO Quantum — playable solo, no multiplayer required. Shares Strategy and Indie with ESTRO Quantum.
The depth of CCG meets the strategy of tabletop gaming in Duelyst! Every choice matters, from your General and deck to positioning on the 9x5 battleboard. Competitive head-to-head turn-based battles at its best!
- 7
Xeno Strike
Single-player alternative to ESTRO Quantum — playable solo, no multiplayer required. Shares Strategy and Indie with ESTRO Quantum.
Build your collection, construct decks, and duel against other players in a sci-fi card battler.
- 8
Requiem of Cards
Single-player alternative to ESTRO Quantum — playable solo, no multiplayer required. Shares Strategy with ESTRO Quantum.
A tactical card battler where creatures move like chess pieces across a 7×7 battlefield. Build your deck, fuse cards into greater monsters and discover all Archtypes. Duel online in 1v1, 2v2, or free-for-all.