The Game Census
Quantum Protocol cover art

Quantum Protocol

Kaio Meris · 2020-11-04

Steam

Strategy

Modes: Single player

Releases: Nov 05, 2020 (PC (Microsoft Windows))

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!

2
playing now
91%
positive of 655 reviews
Very Positive
steam rating
50,000–100,000
owners (SteamSpy est.)
platinum
deck/linux tier (ProtonDB)
$12.99
steam price (US)

2 players in-game as of 2026-08-30 08:00 UTC (census sample)

Health check

Insufficient data
  • · Not enough review history collected yet to judge health.
  • · Top 39% of 5,887 Strategy games in the census by review count.
Estimated sales: 13k–29k copies

Review-multiple estimate from 655 total reviews — how this is computed.

All-time low: $9.09 at Steam (2023-03-16)via IsThereAnyDeal

12-month high $12.99 · on sale 5 of 10 observed days (census price snapshots)

Players online

402026-08-11 22:00 — 2 players2026-08-12 14:00 — 3 players2026-08-13 06:00 — 0 players2026-08-13 21:00 — 1 players2026-08-14 13:00 — 4 players2026-08-15 05:00 — 3 players2026-08-15 21:00 — 1 players2026-08-16 13:00 — 2 players2026-08-17 05:00 — 1 players2026-08-17 21:00 — 0 players2026-08-18 12:00 — 2 players2026-08-19 04:00 — 2 players2026-08-19 20:00 — 2 players2026-08-20 12:00 — 2 players2026-08-21 03:00 — 1 players2026-08-21 19:00 — 2 players2026-08-22 11:00 — 3 players2026-08-23 03:00 — 2 players2026-08-23 18:00 — 0 players2026-08-24 10:00 — 3 players2026-08-25 02:00 — 2 players2026-08-25 18:00 — 0 players2026-08-26 10:00 — 3 players2026-08-27 03:00 — 3 players2026-08-27 18:00 — 0 players2026-08-28 11:00 — 4 players2026-08-29 03:00 — 4 players2026-08-29 19:00 — 0 players2026-08-30 08:00 — 2 players
Concurrent players, hourly average, last 30 days (census samples).

Price history

$12.99$9.092020-11-052026-07-092020-11-05 — best price $11.692020-12-22 — best price $10.392021-02-11 — best price $10.392021-06-24 — best price $10.392021-10-21 — best price $10.392021-10-28 — best price $9.742021-11-24 — best price $9.742021-12-22 — best price $9.742022-01-27 — best price $9.742022-05-02 — best price $9.742022-06-23 — best price $9.742022-11-22 — best price $9.742022-12-22 — best price $9.742023-03-16 — best price $9.092023-06-29 — best price $9.092023-08-28 — best price $9.092023-11-21 — best price $9.092023-12-21 — best price $9.092024-02-05 — best price $9.092024-03-14 — best price $9.092024-03-25 — best price $9.092024-06-27 — best price $9.092024-11-27 — best price $9.092024-12-19 — best price $9.092025-03-13 — best price $9.092025-06-26 — best price $9.092025-09-29 — best price $9.092025-12-18 — best price $9.092026-03-19 — best price $9.092026-05-04 — best price $9.092026-06-25 — best price $9.092026-07-09 — best price $12.99
Lowest recorded price across tracked stores, per day (census snapshots).

Details

WindowsSingle-playerSteam AchievementsSteam Trading CardsSteam CloudFamily Sharing1 DLC

5 supported languages: English, Japanese, Korean, Simplified Chinese, French

Console footprint

PlatformPlayers trackedCompletionTrophies/achievements
Steam (Steam)5305%11

Players tracked by Exophase (achievement/trophy trackers) — a sample of the player base, not total sales.

Player tags

PvEAnimeLogicComedySci-fiFantasyHackingCard GameRogue-liteClass-Based

Census log

Computed from census-recorded observations only — dates are observation dates.

Players also track

Cthulhu RealmsSlay the SpireTrials of FireMahjong Soul

Similarity via IGDB.

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