Gameplay · Fixed a bug with Finger Gun push functionality which caused velocity to apply to non-player entities, which would in turn break doors off of hingers · Fixed a bug when you could switch between two different Gadget weapons and end up with no weapon in hands after using the last Gadget · Increased default Spectator Ghost Hat speed from 2048 to 2304 u/s Maps City · Fixed issues with clu…
Major update · published 12 Dec 2025, 20:17:08 UTC
Treason Update #11 (12.12.2025)
The final update of this year. Welcome to Treason Update #11! Without further ado, let's get right into it. The highlight of this update is native Linux support. We have ported Treason to Linux, which was quite more complicated than just hitting "compile" on the source code. Be warned, if you had Treason installed before with the Windows build on your Linux machine, you MUST uninstall the game…
Hello! We've been working behind the scenes on getting Treason to work natively on Linux, and we would like to get your help in it. We've pushed a brand new beta branch called linux_testing for both game client and dedicated server and we would like you to test it out before we can officially push it to the main game. It is compatible with the public build, meaning you can connect from Linux be…
Stability · Temporary (or not) workaround for low model quality causing player models to render inadequate decals and crash the game (disabled LODs entirely for now; probably not going to come back any time soon, unfortunately) Please let us know if you still experience graphical glitches with decals. Thank you for sticking with us!
Major update · published 22 Aug 2025, 16:24:56 UTC
Treason Update #10 (22.08.2025)
Hello and welcome to our latest and greatest update for Treason! This has been the longest update to make, but we have a lot of things to share with you! We hope you like it. We're starting off by introducing global Steam Leaderboards . This is launching as an experiment, so we've only added a handful of things to track, but more are coming in the future! Right now they include total score earn…
Stability · Fixed server crash when rapidly disconnecting and re-joining the same server · Fixed an exploit related to player packet loss We are currently working on a pretty big update and it's coming very soon! Thank you for sticking with us!
This event is all about bringing new and veteran players together to experience the thrill of Treason—the mafia-themed game where wit, intuition, and deception rule the day. Whether you’re a seasoned strategist or just starting out, you’ll have the chance to join in on intense rounds of gameplay and see how players bluff, strategize, and work their way through tricky situations. We’re so gratef…
In-game event · published 18 Dec 2024, 17:09:00 UTC
Treason Update #9 (18.12.2024)
For the final time this year, welcome back to the new update! We've got something special for you this time... The biggest addition of this update is introduction of friend lobbies! You can now play with your friends without occupying a public server with just one press of a button, powered by P2P networking from CoaXioN Coplay. This was a highly requested feature and we hope it will encourage…
Major update · published 31 Oct 2024, 19:16:35 UTC
Treason Update #8 (31.10.2024)
Welcome to our longest update in the making thus far! We've continued to expand on the gameplay in many different ways, so we hope it was worth the wait. Player classes Please welcome some new faces to our ranks: the Light and Heavy classes! With this update, you now get to choose between three classes, each with its buffs and nerfs. These gameplay modifiers do not apply in Annihilation, and wh…
Gameplay · Changed default power supply toggle time to 2 seconds ( t_cpu_powersupply_toggle_time ) · Replaced Troy pseudo name with Rolo UI · Potentially increased fidelity of HUD progress bar Maps · Fixed some missing polygons · Updated Don spawn positions · Updated Zombie Don syring spawn positions Thank you for sticking with us!
Stability · Fixed a rare server crash when a player was in pre-death state and the round restarted during that period · Fixed very rare instances of kick vote permanently preventing a player from re-joining, if a level change has occured shortly after a kick vote Gameplay · Fixed Don glow sometimes missing · "Can I play, daddy?" achievement no longer requires you to open your profile menu to un…
Major update · published 24 Mar 2024, 18:18:04 UTC
Treason Update #7 (24.03.2024)
We're back with another update! This time, we've got quite some interesting stuff for you to look at. Please share your feedback with us! Some of you might've already noticed it on our Steam Store page, but we added Steam Achievements ! With that, we've also added some new Steam Stats for them! Playing Treason now has more reward than ever. We've added a C.P.U. Power Supply™️ . Traitors are now…
Major update · published 31 Jan 2024, 16:03:56 UTC
Treason Update #6 (31.01.2024)
First update of the year and today the game turns one year old! Please share your feedback with us! We got a brand new gun in stock today for you! Remington Model 81 is a powerful 5-round rifle, capable of quickly disposing of those pesky Traitors. We've added a brand new Shield ability for the Detective and during Annihilation. It lasts t_shield_duration seconds (default: 5 ) and lets you take…
Celebrate the Christmess season in Treason. Veterans and newcomers alike come together for a festive night of deception. Whether you're an innocent trying to sniff out the traitors, a traitor trying to take down the innocents, the detective trying to solve the case or the doctor arriving to late to ressuscitate? Join Treason tonight, there is something for everyone. And the best part? It's free…
Major update · published 21 Dec 2023, 16:58:30 UTC
Treason Update #5 (21.12.2023)
We are back with the last update for this year! Please share your feedback with us! First thing we introduced is Steam Rich Presence. Now whenever you see your friend playing Treason, you'll see what map they are playing and how many players they have on their server while also being able to join them by clicking RMB on them in friends' list and then "Join Game", as long as they are not playing…
Attention goons of all ranks and experience levels. Hope y'all like the update! :) Join us for a special Treason Fright Night, where veterans and newcomers unite for a spectacular evening of betrayals and shenanigans. Have fun! Klaus
Gameplay · Players can no longer use items in pre-death state · Potentially fixed incorrect proximity voice chat position for players out of PVS · Fixed pre-death use sound spatialization Maps City · Potentially fixed issues with players spawning inside each other Thank you for sticking with us!
Major update · published 26 Oct 2023, 18:58:58 UTC
Treason Update #4 (26.10.2023)
We're back! This update certainly didn't take as long to cook as the last one, but it doesn't mean that it's a small one, either! Please share your feedback with us! For starters, we updated the leveling system we introduced in the last update to ensure that it takes longer to obtain new levels. Each new rank now requires slightly more score per level, as opposed to having the same number of sc…
NewsTreason Game Night! Community session #1———Steam news
Steam news · published 18 Aug 2023, 09:00:52 UTC
Treason Game Night! Community session #1
Attention goons of all ranks and experience levels! The time has come to reassemble for an unforgettable night of cunning strategy, thrilling betrayals, and heart-pounding suspense. Join us for a special Treason Game Night, where veterans and newcomers unite for a spectacular evening of espionage.
Gameplay · Potential fix for voting ending prematurely · Fixed Bombs planted and win stats not working correctly · Death chat messages are no longer printed when a player enters pre-death state and will only print when player leaves pre-death state Thank you for sticking with us!
Tools · Updated t_entityzoo example map with MP40 and Colt weapons Stability · Fixed server crash when typing in team chat as Traitor Gameplay · Lowered default player count required for Doctor to 10 ( t_dev_min_players_for_doctor ) · Fixed flies not spawning for Doctor ragdoll · Added new stats: Deaths count and K/D ratio UI · Confirmed dead players are now groupped at the bottom of Scoreboard…
Long time no see! This update took longer to cook than we'd hoped, but it's because it's just that good! Please share your feedback with us! For starters, it appears that we hear an ambulance nearby: The Doctor has arrived to help Innocents resuscitate unconscious people and find out who the Traitors are! If a player gets shot down when Doctor is present, they will have 30 seconds to be resusci…
- Fixed SSE and SSE2 are required and Game shader trying to override a base shader errors on startup for players that have other Source Engine games in their PATH; - Fixed a server crash when a player who did the first kill of the round left the server before the end of the round; - Added a team kill punisher: if a player is at or below t_teamkill_karma_threshold karma (default: 50 ), killing t…
- Hammer editor can now be launched using a .bat file; - Added in-game hint pop-ups; - Don's body will now glow if it isn't found in t_clue_objective_body_glow seconds (default: 30s ); - Traitors will automatically win after t_clue_objective_draw_time seconds (default: 60s ) if Don's body isn't found; - Voice commands cooldown will now be increased by t_voice_cooldown_spam seconds (default: 0.5…