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A visual novel deckbuilding card game where it's always your turn. Play as the master hackers of Quantum and take on the most dangerous malware in the world. Every action matters. Make plays, upgrade your deck, and break the enemy board!
Game modes: Single player
Right now the lowest price for Quantum Protocol we're tracking is $12.99 at Steam. We compare 1 store and prices refresh every few minutes.
The lowest price we've recorded for Quantum Protocol is $9.09 at Steam on June 28, 2026. The current best price is about 43% above that low.
91% of 654 Steam user reviews for Quantum Protocol are positive ("Very Positive").
Quantum Protocol released on November 5, 2020, developed by Kaio Meris and published by Kaio Meris.
Quantum Protocol is available on PC (Microsoft Windows). It supports single player.
Quantum Protocol last hit a new low of $9.09 on June 28, 2026 at Steam. Current best price is $12.99. Prices on this page refresh every few minutes, so check back around seasonal sales for new lows.
The cheapest Quantum Protocol price right now is $12.99 at Steam.
| Store | Discount | Price | Buy link |
|---|---|---|---|
 SteamBest price | — | $12.99 | Buy Quantum Protocol at Steam |
All-time low: $9.09 at Steam on Jun 28, 2026 — the current best price is 43% above it.
Prices in USD, refreshed every few minutes. Switch currency on this page for EUR/GBP/BRL and more.
