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Treason

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App ID 1786950
App Type Game
Store Name Klaus Veen's Treason
Developer
Publisher Klaus Veen
Supported Systems Windows
Technologies Source Engine
Last Changenumber 31593961
Last Record Update 10 October 2025 – 11:45:49 UTC ()
Release Date 31 January 2023 – 16:12:20 UTC ()
😎 85.19%
1k reviews
6
In-Game
+6
🠊 Social Deduction 🥊 PvP 🔫 FPS 🤝 Party-Based RPG 💥 Action

Treason is a 3-16 player party shooter of teamwork and betrayal, set among Italian mobsters. Use proximity voice chat, unique abilities/gadgets, and strategy to prove your innocence or deceive others.

Additional Information

This game is excluded from Steam Family Sharing because: Free Game

Developer Tomorrow Software
community_visible_stats Yes
ReleaseState released
Publisher Klaus Veen
IsFreeApp Yes
Exclude from family sharing (exfgls) 3 (Free Game)
Store Release Date 31 January 2023 – 16:12:20 UTC ()
osarch empty string
community_hub_visible Yes
Social Media https://discord.gg/fGvfTyYGge
Primary Genre Free to Play (37)
Store Genres Action (1), Casual (4), Indie (23), RPG (3), Strategy (2), Free to Play (37)
Steam Release Date 31 January 2023 – 16:12:20 UTC ()
Store Asset Modification Time 22 August 2025 – 09:38:20 UTC () (1755855500)
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width_pct56.90052349695219
height_pct73.78294941819044
osextended empty string
Is free on the store? Yes
review_score 8
review_percentage 89
Detected Technologies (?) Source Engine, Autodesk_FBX SDK, Bink_Video SDK, Miles_Sound_System SDK, OpenVR SDK, SDL SDK
Steam Deck Compatibility
  • Steam Deck:
  • Some functionality is not accessible when using the default controller configuration, requiring use of the touchscreen or virtual keyboard, or a community configuration
  • This game sometimes shows mouse, keyboard, or non-Steam-Deck controller icons
  • Entering some text requires manually invoking the on-screen keyboard
  • This game supports Steam Deck's native display resolution but does not set it by default and may require you to configure the display resolution manually
  • In-game interface text is legible on Steam Deck
  • This game's default graphics configuration performs well on Steam Deck
  •  
  • SteamOS:
  • This game runs successfully on SteamOS
  • Note: Entering some text requires manually invoking the on-screen keyboard
  • Note: Some functionality is not accessible when using the default controller configuration, requiring use of the touchscreen or virtual keyboard, or a community configuration
  •  
  • category: Playable
  • steamos_compatibility: Compatible
  • test_timestamp: 25 April 2023 – 00:00:00 UTC
  • tested_build_id: 10490100
  • configuration:
    supported_inputgamepad
    requires_manual_keyboard_invoke1
    requires_non_controller_launcher_nav0
    primary_player_is_controller_slot_00
    non_deck_display_glyphs1
    small_text0
    requires_internet_for_setup0
    requires_internet_for_singleplayer0
    recommended_runtimeproton-stable
    requires_h2640
    requires_voice_files0
    gamescope_frame_limiter_not_supported0
    hdr_support0
Content Descriptors Frequent Violence or Gore (2), General Mature Content (5)
First seen on SteamDB 9 October 2021 – 08:58:55 UTC (), in changelist #12800597
Content Descriptors (Including DLC) Frequent Violence or Gore (2), General Mature Content (5)

Supported Languages

1 Languages Interface Full Audio Subtitles
English Yes Yes Yes

Tags

🠊 Social Deduction 🥊 PvP 🔫 FPS 🤝 Party-Based RPG 💥 Action 🌪️ Battle Royale 🛡️ Tactical RPG 🤝 Party Game 💥 Action RPG 🌟 Arena Shooter 🕵️ Detective 🔍 Investigation 🔫 Extraction Shooter 🕹️ Multiplayer 🙌 First-Person 🐺 Werewolves 👥 Online Co-Op 🗣️ Conversation 🥳 Party 🥷 Stealth

Categories

Online PvP LAN PvP Online Co-op LAN Co-op Steam Achievements Steam Cloud Stats Includes level editor Includes Source SDK Profile Features Limited Multi-player PvP Co-op

Accessibility Categories

Stereo Sound Surround Sound Playable without Timed Input

Assets

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Assets
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timestamp14 September 2025 – 21:42:49 UTC

Trailer 960393 ↴

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all_ages true
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timestamp 22 August 2025 – 12:06:20 UTC

Trailer 777073 ↴

trailer_name Klaus Veen's Treason - Trailer
trailer_category 3
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all_ages true
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timestamp 22 August 2025 – 12:06:22 UTC

Steam charts

  • 6 players right now
  • 12 24-hour peak
  • 226 all-time peak 12 February 2023
SteamDB.info

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Store data

Twitch stats

  • 0 viewers right now
  • 0 24-hour peak
  • 23,114 all-time peak
  •  

Owner estimations

Monthly players breakdown

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Steam hub followers history

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User reviews history

  • 😎 Very Positive
  • 85.19% SteamDB Rating
  • 1,295 89.6% positive reviews
  • 150 10.4% negative reviews

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How many players are playing Treason right now on Steam?

Steam player counter indicates there are currently 6 players live playing Treason on Steam.

Treason had an all-time peak of 226 concurrent players on 12 February 2023.

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