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Treason

Wishlist Follow Ignore Launch Unwatch Watch
App ID 1786950
App Type Game
Store Name Klaus Veen's Treason
Developer
Publisher Klaus Veen
Supported Systems Windows Linux
Technologies Source Engine
Last Changenumber 39354365
Last Record Update 30 September 2026 – 18:10:38 UTC ()
Release Date 31 January 2023 – 16:12:20 UTC ()
😎 85.25%
1k reviews
1
In-Game
+7
🠊 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

Developer Tomorrow Software
community_visible_stats Yes
ReleaseState released
Publisher Klaus Veen
IsFreeApp Yes
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 12 December 2025 – 15:46:20 UTC () (1765554380)
library_assets
library_capsuleen
library_heroen
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library_headeren
logo_position ↴
pinned_positionBottomLeft
width_pct37.1100694806542
height_pct68.46354785086677
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: Some functionality is not accessible when using the default controller configuration, requiring use of the touchscreen or virtual keyboard, or a community configuration
  • Note: Entering some text requires manually invoking the on-screen keyboard
  •  
  • category: Playable
  • steamos_compatibility: Compatible
  • steam_machine_compatibility: 2
  • test_timestamp: 25 April 2023 – 00:00:00 UTC
  • tested_build_id: 10490100
  • steam_machine_tests:
    0 ↴
    display3
    token#SteamMachine_TestResult_DefaultControllerConfigNotFullyFunctional
    1 ↴
    display3
    token#SteamMachine_TestResult_ControllerGlyphsDoNotMatchDevice
    2 ↴
    display3
    token#SteamMachine_TestResult_TextInputDoesNotAutomaticallyInvokesKeyboard
    3 ↴
    display4
    token#SteamMachine_TestResult_DefaultConfigurationIsPerformant
  • 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
    requires_proton_soundfonts0
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

Assets

Load all asset images
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header_image
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library_assets_full
library_capsule ↴
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library_hero ↴
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library_hero_blur ↴
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Assets
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header_2x8c7602d47739e0008a900d227e2bca4684918d6b/header_2x.jpg
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last_modified13 December 2025 – 14:17:19 UTC
timestamp13 December 2025 – 14:17:19 UTC

Trailer 960393 ↴

trailer_name Goldec's Explanation Guide
trailer_category 1
microtrailer ↴
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adaptive_trailers ↴
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timestamp 22 August 2025 – 12:06:20 UTC

Trailer 777073 ↴

trailer_name Klaus Veen's Treason - Trailer
trailer_category 3
microtrailer ↴
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timestamp 22 August 2025 – 12:06:22 UTC
Open link