Operation Event Horizon: May 2026 Update is here! Find out what's new

Cache 4 Goals
Achievements, New Collections, Music Kits, Maps and more!
1 day ago
10th May, 2026 12:28
Avatar of ZeRo
Posted by ZeRo
3 minutes read
AI Summary

The May 2026 Operation Event Horizon update adds achievements for Global Garry’s Mod, Timer Engine, Bunny Hop, and Surf, plus new web-based trade offers. It introduces Glitter Stickers, with creator documentation coming soon, and refreshes the roadmap with separate main and event views. New maps Cache and Zoo are now available across several modes. The update also adds 9 collectable backgrounds, the Cache Collection, Best of Counter-Strike Series #3 Glitter stickers, Half-Life: Alyx stickers, and NIGHT MODE II Music Kits. Overall, it’s a feature-heavy update focused on progression, trading, cosmetics, and map variety.

Introduction

The May 2026 Update for Operation Event Horizon is now here!

This update introduces some brand new features, economy items and maps.

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✨ Glitter Stickers

This update introduces the Glitter style for Stickers. This style accurately reflects real-life glitter stickers.

We'll be providing Content Creation documentation for Glitter stickers within the next few days so that content creators can create their own!

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🎖️ Introducing Achievements

Today's update introduces a feature we've been wanting to add for a while: Achievements.

Achievements are now available for:

  • Global Garry's Mod: These achievements are global and can be achieved on any gamemode.
  • Timer Engine: These achievements work on any Timer Engine based gamemode
  • Bunny Hop
  • Surf

We have selected a small set of gamemodes to start out with to gather feedback and help improve the system and in future updates we'll be adding support for more gamemodes.

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🤝 Introducing Trade Offers

This update introduces Web Trade Offers.

Go to any user profile and go to Actions and then "Send Trade Offer" or alternatively go to https://lambda.tf/trade-offers and click on "Send Trade Offer"

Trade offers work similar to STEAM.

You cannot send trade offers to users who have set their inventory to private or friends only (Unless you are friends with them)

Trade offers are automatically cancelled if either party cannot afford the money offers or the items offered have changed ownership or have been quick sold.

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☢️ New Map: Cache

The Original (Non-Green) edition of Cache is here! Now available on Deathmatch, Casual, Guardian and Chicken Defusal

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🦒 New Map: Zoo

A community favourite; Zoo makes it's debut on Lambda, being available on Deathmatch, Casual, Guardian and Chicken Defusal

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🛣️ New Roadmap

We've refactored our Roadmap to make it look nicer and to allow us to have multiple roadmaps.

We now have a main Roadmap and a specific one for Operation Event Horizon

You cank click on each item on the roadmap, view details and share your feedback by commenting and reacting.

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🌄 Collectable Backgrounds: Series #3

We've listened and have added 9 brand new collectable backgrounds!

You can obtain a random one from the Operation Store.

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☢️ Cache Collection

Launching alongside the return of Cache; The Cache Collection introduces 13 high quality weapon finishes themed around the map.

The Cache Collection is available in the Operation Store.

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🩹 Best of Counter-Strike: Series #3 Stickers

With the introduction of Glitter stickers in this update, we've also bought forward our plans for the next CS2 sticker capsule.

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🏙️ Half-Life: Alyx Sticker Capsule

This update also brings in the Half-Life: Alyx Stickers.

These are now available to purchase in the in-game store.

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🎶 NIGHT MODE II Music Kits

Introduced in CS2 a few days ago, The NIGHT MODE II Music Kits are now available in the NIGHT MODE II Music Kit Box (Also available in StatTrak).

Both boxes are available to purchase on the in-game store.

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📝 Change Logs

Here are the change logs for today's update.

Garry's Mod icon
Garry's Mod
Added
Users who are signed up to Lambda Labs now get a unique in-game collectable trophy
Added
Cache Collection

Now available in the Operation Event Horizon Store

Added
Added support for Glitter stickers
Added
Added Best of Counter-Strike #3 Sticker Capsule

With a new style (Glitter), the Best of Counter-Strike #3 capsule contains the very best of Counter-Strike including the very best glitter stickers.

Removed
Removed "Friend Message Sound" option in Chat Options

The in-game chat system has been gone for a while now.

Added
Added support for web trade offers
Added
Achievements System

Introducing a Steam-like achievements system. The initial system covers global achievements (e.g any gamemode) and Timer Engine, Surf and Buny Hop with more gamemodes to follow.

New Feature for Premium Users: You can change the sound that's made when you unlock an achievement 😎

Added
Added In-game Lambda Labs support for any future in-game features.
Added
Added NIGHT MODE II Music Kits

Regular and StatTrak boxes are now available to purchase from the in-game store.

Removed
Removed Easter Eggs
Added
Operation Event Horizon Missions
Removed
Removed Rising Sun collection from the Operation Event Horizon Store
Removed
Removed Ascent Collection from the Operation Event Horizon Store
Added
Added Cache Collection to the Operation Event Horizon Store
Added
Added Control Collection to the Operation Event Horizon Store
Removed
Removed "Random Dead Hand Gloves" from the Operation Store
Removed
Removed Best of CS #2 Sticker Capsule from the Operation Store

Now available to purchase in the in-game store.

Added
Added Series #3 Profile Backgrounds

A random background is now available in the Operation Store.

Improvement
Premium Users can now change the Terminal OS startup sound
Added
Added Half-Life: Alyx Sticker Capsule

Now available to purchase in the In-game Store

Added
Added Easter 2026 Terminal to the drop pool
Improvement
Replaced all pp/blurscreen draws with shaders
Removed
Removed legacy, unused code.
Fixed
Fixed an issue where in some cases clients would receive a Lua error for an invalid view model when attempting to composite gloves
Fixed
Fixed some content creation credits that were missing from some gloves
Timer Engine
Added
Implemented Timer Engine core achievements
Added
Added a new hook when a player completes a map

PlayerCompletedTimerEngineMap contains a detailed table rather than expanding hook arguments

Surf (Timer Engine)
Added
Implemented Surf related achievements
Bunny Hop (Timer Engine)
Added
Implemented Bunny Hop related achievements
Added
New Map: bhop_airphase (Tier 1, Linear)
Added
New Map: bhop_crimsondungeon (Tier 1, Linear)
Added
New Map: bhop_candy_saarc (Tier 1, Linear)
Added
New Map: bhop_hex (Tier 2, Staged)
Added
New Map: bhop_blurry (Tier 3, Linear)
Added
New Map: bhop_deception (Tier 3, Linear)
LambdaNet Matchmaking
Removed
Removed Zombie Survival

Zombie Survival is now going to go through a rework and will return in October.

Website
Added
Added new image assets for new economy items
Added
Added Achievments back end
Added
Added a list of achievements to the Wiki
Added
Added achievments to user profiles
Added
Trade Offers

Go to any Lambda User profile and then go to Actions => Send Trade Offer

You can request items from their inventory along with offering your own. You can also offer money.

Trade offers work similar to STEAM

Added
News Post section types

We can now embed economy item carousels directly in news posts

Added
New Roadmap system

The existing roadmap system has been removed and replaced with our own custom written one. We can now have multiple roadmaps for different projects, in this case we have a main roadmap which can be found Here and Operation Event Horizon now has it's own Roadmap which can be found Here

Added
Removed the game parameter from the issues page.

Now that we have the game selector, this is no longer required.

URL's have changed, please update any bookmarks you may have.

Fixed
Fixed an issue where StatTrak kills would not reset after items are purchased from the market.
Fixed
Fixed an issue where games and subgames would sometimes duplicate due to a race condition
Added
Competition System

This will initially be used for Content Creation competitions but we will expand this in the future. The new system allows users to sign up to competitions and link their workshop submissions directly against the competition, with a clear prize list.

New Feature
AI News Summary is now out of Labs
New Feature
Added a toggle under account settings to turn off AI features.
Added
Added New Items Feature on the Wiki
Deathmatch
Added
New Map: Cache
Added
New Map: Zoo
Guardian
Added
New Map: Cache
Added
New Map: Zoo
Casual
Added
New Map: Cache
Added
New Map: Zoo
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Comments
Avatar of Blazing
1 day ago

very much