Aug 2026 Update
Right clicking a card now shows the full effect text, not just a larger card image.
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!
| App ID | 1328530 |
|---|---|
| App type | Game |
| Developer | Kaio Meris |
| Publisher | Kaio Meris |
| Homepage | https://www.kaiomeris.com/quantum |
| Release date | 2020-11-04 00:00 UTC |
| Release state | released |
| Store page | store.steampowered.com/app/1328530 |
| Last store refresh | 1 hour ago |
| # | Executable | Arguments | OS | Description |
|---|---|---|---|---|
| 0 | Quantum.exe | windows |
No player history yet. This app is now tracked, so data will appear within about ten minutes.
| Playing now | Not polled yet (never) |
|---|---|
| 24-hour peak | |
| All-time peak (tracked) |
All Steam store regions, converted to USD at today's exchange rate, compared with the US price. Lowest is the lowest price SteamRaw has recorded for that region.
Loading regional prices…
| Date | Price | Regular | Discount |
|---|---|---|---|
| 2026-09-11 21:12 UTC | $12.99 | $12.99 |
| DLC | AppID | Release | Price |
|---|---|---|---|
| No DLC known for this app. | |||
| Branch | Build ID | Description | Updated | Password |
|---|---|---|---|---|
| public | 24624107 | 2026-08-08 02:11 UTC |
| Depot | Name | OS | Size | Download | Public manifest | Notes |
|---|---|---|---|---|---|---|
| 228988 | windows | from app 228980 · shared install | ||||
| 228990 | windows | from app 228980 · shared install | ||||
| 1328531 | windows · 64 | 1.86 GB | 647.30 MB | 3029445920705952914 |
A build is one published version of the game's files on a branch. Steam assigns a new build ID every time the developer pushes an update, so this list is the update history of the app. The files inside a build (depot manifests) are only readable with an account that owns the game, which SteamRaw does not have yet, so build contents are not shown.
| Build ID | Branch | Updated | First seen |
|---|---|---|---|
| 24624107 | public | 2026-08-08 02:11 UTC | 2 hours ago |
Every appinfo change SteamRaw has observed, grouped by changelist. Tags, features, languages, builds, depots, prices and any other key Steam publishes. Tracking since 2026-09-11 21:12 UTC.
No changes recorded since SteamRaw first saw this app. Every future PICS change will be listed here.
| Changelist | Apps | Packages | Seen | What changed |
|---|---|---|---|---|
| No changelists recorded for this app yet. | ||||
Right clicking a card now shows the full effect text, not just a larger card image.
Predator enemy will now only chase cards if their health is below their base max health (instead of current max health). This matters for cases where HP is modified.
Fixed issue where Bow and Katana would not trigger Omen.
-- Correction of card effects and terms -- Updates to story text to read more naturally The updated story text is worth re-reading for veteran players, please give it a try :D {STEAM_CLAN_IMAGE}/37905959/0ac94c7dd91ad3ecc9d9fd7868fa6d7fe7e8edee.png {STEAM_CLAN_IMAGE}/37905959/af11a5686df00b12e69fca07199399fe2036248f.png
Fix issue with damage negation. Damage negation will now show properly in the Action Log, and cards like Taser or Vampire effects will behave more intuitively if they have their damage negated. Fix issue with Treble and Omen. Treble will now properly proc Omen.
Fixed an infinite combo that could softlock the game with crosscode cards.
Added French localization.
A new collab deck is here, this time featuring the fantastic space shooter Nova Drift! https://store.steampowered.com/app/858210/Nova_Drift/ {STEAM_CLAN_IMAGE}/37905959/06f5c65aa5416efe0cff517f5653b5c35a195448.jpg Many familiar ships and mods take on a new form, reimagined as Quantum Protocol cards. Play mods to mix and match effects onto your ships and discover new combinations every run! Will you go all in with damage? Or balance defensive mods with offensive power? Or maybe focus on setting up the field to drop the almighty Leviathan!!! The choice is yours. The card art is by none other tha
Fix broken Discord link on the title screen.
Updated Chinese text.
Small update to localization.
Small changes to Chinese text.
{STEAM_CLAN_IMAGE}/37905959/ab9915ab357b1c42bc19e14279b790c549605902.png Chinese Simplified language is finally here! Also, here's a cute Dragoon with a Dragoon plushie. I think she likes it
{STEAM_CLAN_IMAGE}/37905959/bc81826eab9100904ec106697b8e19a378b5c40b.png Korean language is here! I hope this will allow even more people to enjoy the game :D Also included are a few fixes: Cards FIXED Gunner not applying counters properly at 0 Turn Draw. FIXED Checkmate stacking with itself. System Can no longer pause during transitions, it was breaking things. Game should now work better on high DPI screens. And with this update, the girls of Quantum have their splash arts :D collect them all in-game. {STEAM_CLAN_IMAGE}/37905959/a4bf65bec2e57e54730ee7c1d9e7c4487b65e7e6.png If you have not al
{STEAM_CLAN_IMAGE}/37905959/fa467a017299af313fba8d913de70bf2e6a3ecef.png A new collab is here! This time for the card game Vault of the Void! Take on dungeons with a brand new playstyle! The deck is fast and aggressive, making use of a super cool combo system inspired by The Hidden from Vault of the Void. The deck is fairly easy to pilot, so give it a try! You can find it on the far right side of the level select, grouped with the other collab decks. As of this update, Vault of the Void is still in Early Access, but having played it a bunch, I can assure you it is well worth playing today and
Full appinfo as delivered by Steam PICS, changenumber 37970468. Also at /api/app/1328530/raw.
{
"appid": "1328530",
"common": {
"name": "Quantum Protocol",
"type": "Game",
"releasestate": "released",
"clienticon": "748269aeac22dea95b51d35f03619e78afb026ef",
"clienttga": "8853521be00cb77443ac37f2a6c0e1ce6353b7e8",
"icon": "0a01d5afe3a44853b7b986e9d7faf2513703a202",
"logo": "39d9ab1256fec7801ce1a9f4eba250ea003c2d78",
"logo_small": "39d9ab1256fec7801ce1a9f4eba250ea003c2d78_thumb",
"oslist": "windows",
"osarch": "64",
"osextended": "",
"eulas": {
"0": {
"id": "1328530_eula_0",
"name": "Quantum Protocol EULA",
"url": "https://store.steampowered.com//eula/1328530_eula_0",
"version": "1"
}
},
"steam_deck_compatibility": {
"category": "2",
"steamos_compatibility": "2",
"steam_machine_compatibility": "3",
"test_timestamp": "1649203200",
"tested_build_id": "8112742",
"tests": {
"0": {
"display": "3",
"token": "#SteamDeckVerified_TestResult_InterfaceTextIsNotLegible"
},
"1": {
"display": "4",
"token": "#SteamDeckVerified_TestResult_DefaultControllerConfigFullyFunctional"
},
"2": {
"display": "4",
"token": "#SteamDeckVerified_TestResult_ControllerGlyphsMatchDeckDevice"
},
"3": {
"display": "4",
"token": "#SteamDeckVerified_TestResult_DefaultConfigurationIsPerformant"
}
},
"steam_machine_tests": {
"0": {
"display": "4",
"token": "#SteamMachine_TestResult_DefaultControllerConfigFullyFunctional"
},
"1": {
"display": "4",
"token": "#SteamMachine_TestResult_ControllerGlyphsMatchDevice"
},
"2": {
"display": "4",
"token": "#SteamMachine_TestResult_DefaultConfigurationIsPerformant"
}
},
"steamos_tests": {
"0": {
"display": "3",
"token": "#SteamOS_TestResult_GameStartupFunctional"
}
},
"configuration": {
"supported_input": "other",
"requires_manual_keyboard_invoke": "0",
"requires_non_controller_launcher_nav": "0",
"primary_player_is_controller_slot_0": "0",
"non_deck_display_glyphs": "0",
"small_text": "1",
"requires_internet_for_setup": "0",
"requires_internet_for_singleplayer": "0",
"recommended_runtime": "proton-stable",
"requires_h264": "0",
"requires_voice_files": "0",
"gamescope_frame_limiter_not_supported": "0",
"hdr_support": "0",
"requires_proton_soundfonts": "0"
}
},
"controllertagwizard": "1",
"small_capsule": {
"english": "capsule_231x87.jpg"
},
"header_image": {
"english": "header.jpg"
},
"library_assets": {
"library_capsule": "en",
"library_hero": "en",
"library_logo": "en",
"logo_position": {
"pinned_position": "CenterCenter",
"width_pct": "100",
"height_pct": "70.7457459329882"
}
},
"library_assets_full": {
"library_capsule": {
"image": {
"english": "library_600x900.jpg"
},
"image2x": {
"english": "library_600x900_2x.jpg"
}
},
"library_hero": {
"image": {
"english": "library_hero.jpg"
},
"image2x": {
"english": "library_hero_2x.jpg"
}
},
"library_logo": {
"image": {
"english": "logo.png"
},
"image2x": {
"english": "logo_2x.png"
},
"logo_position": {
"pinned_position": "CenterCenter",
"width_pct": "100",
"height_pct": "70.7457459329882"
}
}
},
"store_asset_mtime": "1620401022",
"associations": {
"0": {
"type": "developer",
"name": "Kaio Meris"
},
"1": {
"type": "publisher",
"name": "Kaio Meris"
}
},
"primary_genre": "2",
"genres": {
"0": "2"
},
"category": {
"category_2": "1",
"category_22": "1",
"category_23": "1",
"category_29": "1",
"category_62": "1"
},
"supported_languages": {
"english": {
"supported": "true",
"subtitles": "true"
},
"japanese": {
"supported": "true",
"subtitles": "true"
},
"koreana": {
"supported": "true",
"subtitles": "true"
},
"schinese": {
"supported": "true",
"subtitles": "true"
},
"french": {
"supported": "true",
"subtitles": "true"
}
},
"steam_release_date": "1604534347",
"community_visible_stats": "1",
"community_hub_visible": "1",
"gameid": "1328530",
"store_tags": {
"0": "4085",
"1": "32322",
"2": "1666",
"3": "3799",
"4": "4155",
"5": "14139",
"6": "1741",
"7": "6730",
"8": "3959",
"9": "3942",
"10": "4182",
"11": "1719",
"12": "9",
"13": "5502",
"14": "1684",
"15": "6129",
"16": "1664",
"17": "4026",
"18": "4726"
},
"review_score": "8",
"review_percentage": "90"
},
"extended": {
"developer": "Kaio Meris",
"publisher": "Kaio Meris",
"homepage": "https://www.kaiomeris.com/quantum"
},
"config": {
"installdir": "Quantum Protocol",
"launch": {
"0": {
"executable": "Quantum.exe",
"type": "default",
"config": {
"oslist": "windows",
"osarch": "64"
}
}
}
},
"depots": {
"228988": {
"config": {
"oslist": "windows"
},
"depotfromapp": "228980",
"sharedinstall": "1"
},
"228990": {
"config": {
"oslist": "windows"
},
"depotfromapp": "228980",
"sharedinstall": "1"
},
"1328531": {
"config": {
"oslist": "windows",
"osarch": "64",
"language": ""
},
"manifests": {
"public": {
"gid": "3029445920705952914",
"size": "2001040711",
"download": "678741728"
}
}
},
"branches": {
"public": {
"buildid": "24624107",
"timeupdated": "1786155108",
"timebuildupdated": "1786155059"
}
}
},
"ufs": {
"quota": "1000000",
"maxnumfiles": "10",
"savefiles": {
"0": {
"root": "WinAppDataLocal",
"path": "Quantum/Saved/SaveGames",
"pattern": "*.sav"
}
}
}
}