The Game Census
Quantum Protocol cover art

Quantum Protocol

Kaio Meris · 2020-11-04

Steam

Strategy

Modes: Single player · Perspectives: Bird view / Isometric

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!

Quantum Protocol is a Strategy game released in 2020, priced at $12.99, with a Very Positive review sentiment (91% of 657 reviews) and an estimated 50,000 to 100,000 owners.

1
playing now
91%
positive of 657 reviews
Very Positive
steam's rating (official)
50,000–100,000
owners (SteamSpy est.)
platinum
deck/linux tier (ProtonDB)
Playable
Steam Deck (Valve)
SteamOS: Playable
$12.99
steam price (US)

1 players in-game as of 2026-10-14 18:00 UTC (census sample)

Health check

Quiet
  • · 1 players in-game at the last census sample.
  • · 23 reviews in the last 8 weeks (~3/week).
  • · Review velocity up 10% vs the prior 8 weeks.
  • · Top 18% of 14,092 Strategy games in the census by review count.

Health tier since 2026-08-31

Estimated sales: 13k–30k copies

Review-multiple estimate from 657 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 4 of 8 observed days (census price snapshots)

Review momentum

PositiveNegative
404020202026Week of 2020-11-01: 18 positiveWeek of 2020-12-01: 6 positiveWeek of 2020-12-01: 1 negativeWeek of 2021-01-01: 8 positiveWeek of 2021-02-01: 7 positiveWeek of 2021-03-01: 32 positiveWeek of 2021-03-01: 3 negativeWeek of 2021-04-01: 15 positiveWeek of 2021-04-01: 1 negativeWeek of 2021-05-01: 24 positiveWeek of 2021-05-01: 1 negativeWeek of 2021-06-01: 37 positiveWeek of 2021-06-01: 3 negativeWeek of 2021-07-01: 26 positiveWeek of 2021-07-01: 5 negativeWeek of 2021-08-01: 17 positiveWeek of 2021-09-01: 8 positiveWeek of 2021-10-01: 21 positiveWeek of 2021-10-01: 2 negativeWeek of 2021-11-01: 15 positiveWeek of 2021-11-01: 1 negativeWeek of 2021-12-01: 40 positiveWeek of 2021-12-01: 2 negativeWeek of 2022-01-01: 23 positiveWeek of 2022-01-01: 3 negativeWeek of 2022-02-01: 15 positiveWeek of 2022-02-01: 3 negativeWeek of 2022-03-01: 7 positiveWeek of 2022-03-01: 2 negativeWeek of 2022-04-01: 4 positiveWeek of 2022-04-01: 1 negativeWeek of 2022-05-01: 19 positiveWeek of 2022-06-01: 8 positiveWeek of 2022-07-01: 8 positiveWeek of 2022-08-01: 3 positiveWeek of 2022-08-01: 1 negativeWeek of 2022-09-01: 4 positiveWeek of 2022-09-01: 1 negativeWeek of 2022-10-01: 6 positiveWeek of 2022-11-01: 7 positiveWeek of 2022-11-01: 2 negativeWeek of 2022-12-01: 6 positiveWeek of 2022-12-01: 4 negativeWeek of 2023-01-01: 13 positiveWeek of 2023-01-01: 2 negativeWeek of 2023-02-01: 7 positiveWeek of 2023-02-01: 1 negativeWeek of 2023-03-01: 5 positiveWeek of 2023-03-01: 1 negativeWeek of 2023-04-01: 3 positiveWeek of 2023-05-01: 4 positiveWeek of 2023-05-01: 1 negativeWeek of 2023-06-01: 4 positiveWeek of 2023-07-01: 8 positiveWeek of 2023-07-01: 3 negativeWeek of 2023-08-01: 6 positiveWeek of 2023-09-01: 3 positiveWeek of 2023-10-01: 8 positiveWeek of 2023-10-01: 1 negativeWeek of 2023-11-01: 8 positiveWeek of 2023-11-01: 1 negativeWeek of 2023-12-01: 14 positiveWeek of 2023-12-01: 1 negativeWeek of 2024-01-01: 11 positiveWeek of 2024-01-01: 1 negativeWeek of 2024-02-01: 12 positiveWeek of 2024-02-01: 1 negativeWeek of 2024-03-01: 17 positiveWeek of 2024-03-01: 2 negativeWeek of 2024-04-01: 11 positiveWeek of 2024-04-01: 1 negativeWeek of 2024-05-01: 1 positiveWeek of 2024-06-01: 8 positiveWeek of 2024-06-01: 1 negativeWeek of 2024-07-01: 11 positiveWeek of 2024-08-01: 5 positiveWeek of 2024-08-01: 1 negativeWeek of 2024-09-01: 2 positiveWeek of 2024-10-01: 3 positiveWeek of 2024-11-01: 4 positiveWeek of 2024-11-01: 1 negativeWeek of 2024-12-01: 5 positiveWeek of 2024-12-01: 1 negativeWeek of 2025-01-01: 1 positiveWeek of 2025-03-01: 7 positiveWeek of 2025-04-01: 1 positiveWeek of 2025-05-01: 4 positiveWeek of 2025-05-01: 1 negativeWeek of 2025-06-01: 2 positiveWeek of 2025-06-01: 1 negativeWeek of 2025-07-01: 1 positiveWeek of 2025-08-01: 3 positiveWeek of 2025-09-01: 1 positiveWeek of 2025-10-01: 5 positiveWeek of 2025-11-01: 2 positiveWeek of 2025-12-01: 3 positiveWeek of 2026-01-01: 5 positiveWeek of 2026-01-01: 1 negativeWeek of 2026-02-01: 3 positiveWeek of 2026-02-01: 1 negativeWeek of 2026-03-01: 2 positiveWeek of 2026-04-01: 3 positiveWeek of 2026-05-01: 3 positiveWeek of 2026-06-01: 1 positiveWeek of 2026-07-01: 1 positiveWeek of 2026-08-01: 1 positiveWeek of 2026-08-01: 1 negative
Weekly review counts (Steam review histogram). Positive above the line, negative below.

Players online

402026-09-15 03:00 — 0 players2026-09-16 11:00 — 2 players2026-09-17 19:00 — 0 players2026-09-19 02:00 — 4 players2026-09-20 10:00 — 2 players2026-09-21 17:00 — 0 players2026-09-23 01:00 — 2 players2026-09-24 08:00 — 1 players2026-09-25 16:00 — 1 players2026-09-26 23:00 — 1 players2026-09-28 07:00 — 1 players2026-09-29 14:00 — 2 players2026-09-30 22:00 — 0 players2026-10-02 05:00 — 1 players2026-10-03 13:00 — 4 players2026-10-04 21:00 — 1 players2026-10-06 05:00 — 2 players2026-10-07 12:00 — 3 players2026-10-08 20:00 — 1 players2026-10-10 03:00 — 3 players2026-10-11 11:00 — 4 players2026-10-12 18:00 — 3 players2026-10-14 02:00 — 0 players2026-10-14 18:00 — 1 players
Concurrent players, hourly average, last 30 days (census samples).
251Nov 2020Aug 2026Nov 2020 — avg 3 · peak 14Jan 2021 — avg 2 · peak 7Mar 2021 — avg 19 · peak 51May 2021 — avg 10 · peak 25Jul 2021 — avg 25 · peak 94Sep 2021 — avg 9 · peak 22Nov 2021 — avg 10 · peak 31Jan 2022 — avg 14 · peak 51Mar 2022 — avg 6 · peak 22May 2022 — avg 10 · peak 35Jul 2022 — avg 9 · peak 35Sep 2022 — avg 5 · peak 15Nov 2022 — avg 6 · peak 25Jan 2023 — avg 7 · peak 22Mar 2023 — avg 6 · peak 22May 2023 — avg 3 · peak 10Jul 2023 — avg 6 · peak 25Sep 2023 — avg 4 · peak 13Nov 2023 — avg 10 · peak 46Jan 2024 — avg 7 · peak 24Mar 2024 — avg 11 · peak 43May 2024 — avg 4 · peak 13Jul 2024 — avg 7 · peak 25Sep 2024 — avg 3 · peak 10Nov 2024 — avg 3 · peak 13Jan 2025 — avg 3 · peak 14Apr 2025 — avg 2 · peak 11Jul 2025 — avg 3 · peak 9Oct 2025 — avg 3 · peak 12May 2026 — avg 3 · peak 11Aug 2026 — avg 2 · peak 7
Monthly average players (source: steamcharts.com) — history via steamcharts.com; live census sampling since Aug 2026.

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).

Completion

11
achievements tracked
69%
earned "Lumei Academy"
12.6%
median achievement earned by

Global achievement rates from Steam.

Details

WindowsSingle-playerSteam AchievementsSteam Trading CardsSteam CloudFamily Sharing1 DLC

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

Post-launch support: 1 DLC released, first 2020-11-05 (Steam store data)

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.

Recent updates

Players also track

Cthulhu RealmsSlay the SpireTrials of FireMahjong Soul

Similarity via IGDB.

Official site ↗Discord ↗