Quantum Protocol

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A 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!

Developer: Kaio Meris
Released: 4 Nov 2020
Price: $12.99
Platforms
Followers: 3,333
Steam Deck: Playable
Languages: English +4

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Players on Steam, last 30 days

Steam concurrent players, polled every 30 days. We began tracking this game on 19 Oct 2026, so this range has no readings before then yet. As of 12:37 UTC.

Show the numbers

Players of Quantum Protocol, last 30 days, newest first
Hour	Peak	Average	Polls
19 Oct, 19:00 UTC	0	0	1

How this is measured

Player counts over time, as we observed them.

Counts people running the game through Steam only. Players on other stores, consoles or launchers are not included.
We poll the busiest games every 15 minutes and quiet ones as rarely as once a month, so a short spike between polls can be missed. Each game shows how often it is polled.
Our player history starts on 19 October 2026. Earlier peaks, including launch peaks, are not in our data.

Source: Steam Web API, ISteamUserStats/GetNumberOfCurrentPlayers. Full methodology

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Quantum Protocol

Players on Steam, last 30 days

Players on Steam, last 30 days

Players By Month

Quantum Protocol

Players By Month