ZAMNHLMP is the multiplayer companion game for Half-Life: Zombies Ate My Neighbours.

This game is a modification of Half-Life and takes advantage of open-source technologies developed by YaLTeR (OpenAG) and BulliT (AG mod) and uses new game modes to give you the best experience.

ZAMNHLMP includes a massive set of official and community-made maps (with credit of course) so you don't have to wait for servers to download maps all the time (it's a lengthy process).

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Announcing ZAMNHLMP 2.6



Hey all. Sabian & Ry13y04 here, the Community Manager of The Phoenix Project Software.

Today, we are excited to announce the all-new 2.6 update of Half-Life: Zombies Ate My Neighbours Multiplayer – Early Access.

Since the release of even 2.3 of ZAMNHLMP, the team have been planning a seasonal scheme for the game to keep it fresh – and with this article, we’re proud to announce that it’s finally happening.

With our next major update – version 2.6, we are starting our seasonal scheme with Season 6: HECU, themed around the Hazardous Environment Combat Unit from the Half-Life universe.

After Season 6 we are planning for four more seasons, ending on Season 10, where the game will then be re-evaluated to see if we can keep adding content. Each season has its own theme, based on either the Half-Life or the Zombies Ate My Neighbors universe, and each season brings in new playermodels, skins, maps, sounds and more to keep the game fresh and full of new content. A typical season will last 1.5-2.5 months.

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So, what new content will we see in Season 6?

  1. We’ve backported all the weapons from Opposing Force into Aura and adapted it to the ZAMNHLMP gameplay & gamemode system.
  2. We added all the Opposing Force playermodels, maps & skins – including Rubble, Repent, Disposal and the correct version of Gasworks.
  3. We added all the Opposing Force sounds, meaning map makers & dataminers can have a play around with those.
  4. We fixed a bunch of bugs and made a bunch of UI enhancements.

What else is new with 2.6?

We’re glad you asked! There is many new features in ZAMNHLMP 2.6, so we may as well cut to the chase.

Linux support and cross-play

Our biggest goal for ZAMNHLMP 2.6 was to get it working on other operating systems than Windows; because PC gamers should play their games how they want to.

I’m proud to say that yes, ZAMNHLMP 2.6 WILL support Linux & Windows-Linux crossplay. You will also be able to host dedicated servers on Linux using ReHLDS.

We were planning for macOS support, but we dropped it due to a few setbacks:

  1. Macs are a much smaller install base for gaming.
  2. After macOS Catalina, 32-bit apps and binaries, including Half-Life no longer function.
  3. M1 Macs cannot run Half-Life as the engine does not support ARM – it is up to Valve if they want to port it.

Some smooth Source engine stuff

One of our many goals was to modernise Aura’s client-side behaviours and fix its inconveniences – one of with being the old Quake-style viewpunch that occurs when you fire any weapon. Working with Phoenix Software’s programming team, including newcomer BlueNightHawk, we backported the smooth viewpunch that you see in Half-Life 2 from the Source 2013 engine to Aura.

We also backported the viewsway and bobbing from Source to Aura. We know that our players like options – therefore, you can turn all of these off in the Multiplayer Advanced Options screen in ZAMNHLMP – which we’ve updated for Aura 2.0, of course. Another option we added for server operators is the ability to change the MP5’s fire rate.

One thing I should note; everything explained in this feature are also explained in the brand new Instruction Manual booklet we prepared for 2.6; ditching the old HTML-style manual we had.

Squashing the bugs

In terms of bugs, a good number of bugs were fixed:

  1. Set the max carry value for the 9mm weapons to 240 – stops the ammo display from getting stuck at “254”
  2. Fixed an issue on Bounce where the lighting would lag the engine
  3. Fixed gamemode and dedicated server settings overriding user-specified options on listen servers
  4. Fixed gamemode names & maps named appearing muffled in the server browser
  5. Fixed the tau cannon’s laser brightness sticking to one value rather than depending on how long the player charged the tau for
  6. Fixed the Gluon Gun’s laser appearing too bright
  7. Added dynamic lighting for weapons
  8. Fixed material sounds on Kasino & Kasino2
  9. Fixed Crowbar Arena continuing to spawn players with all weapons
  10. Fixed an issue where the spectator menu labels would not show

New toys

Here’s the extensive list of everything we added in ZAMNHLMP 2.6 and Season 6:

  1. Ported viewbobbing from Source 2013 (HL2)
  2. Ported viewmodel lag/sway from Source 2013 (HL2)
  3. Removed viewroll
  4. Added footstep sounds for wooden surfaces
  5. Added a command to change the MP5’s fire-rate – when set to 0, it uses the fire-rate from AG.
  6. Bounce is now set in night-time
  7. Backported the Command Menu from TFC with quick options mid-game that can be opened using the “/” key
  8. Added new glock sounds
  9. The Egon now uses 5 uranium cells at onces (yeah, we nerfed it, what you gonna do?)
  10. Fixed an issue on Crossfire where players couldn’t shoot through one of the red railings
  11. Fixed an issue on Crossfire where players couldn’t shoot through the grate fence
  12. Fixed an issue on Crossfire where players could clip through the red railing in the bunker
  13. Added new explosion sounds

…and this isn’t the full list. While 2.6 works 100% as far as we are aware, it is still under heavy playtesting. However, it is THIS CLOSE to being finished. We hope to release it by the end of August. But, as always, it’s ready when it’s ready.

Or you could play the in-development version now. I don’t care which you choose.

Introducing the all-new Phoenix Insider program – the one-stop place for those eager to see more to try out early builds of games by The Phoenix Project Software. The first title we are testing in this program is ZAMNHLMP 2.6.

You can sign up here - Forms.gle - and when the time comes, you will receive an Email (or a Discord ping on our server) when a new build is ready to test.

‘Till the next time

Thanks for reading and considering signing up for Phoenix Insider. It’s free and takes 5 minutes, so what’s stopping you?

We hope to see you in the Snark Pit when 2.6 releases!


Community Manager @ The Phoenix Project Software

-Sabian Roberts

Lead Developer @ The Phoenix Project Software

ZAMNHLMP 2.5 - the best update yet, releasing midnight GMT!

ZAMNHLMP 2.5 - the best update yet, releasing midnight GMT!

News 1 comment

We are excited to announce our latest version of ZAMNHLMP.

RSS Files
Half-Life: ZAMN Multiplayer - Season 6: HECU (v2.6) FULL UPDATE + AURA 2.0 SDK

Half-Life: ZAMN Multiplayer - Season 6: HECU (v2.6) FULL UPDATE + AURA 2.0 SDK

Full Version

Since May, the team at The Phoenix Project Software have been working on this update to one of the best multiplayer mods for HL1. This, is Season 6: HECU...

Half-Life: Zombies Ate My Neighbours Multiplayer v2.5.1 (REQUIRES 2.5)

Half-Life: Zombies Ate My Neighbours Multiplayer v2.5.1 (REQUIRES 2.5)


This is the 2.5.1 patch of ZAMNHLMP for 2.5, including many long-awaited changes! THIS REQUIRES INSTALLING VERSION 2.5 FIRST!!! Click 'Read more' for...

Half-Life: Zombies Ate My Neighbours Multiplayer v2.5 (+ Aura 1.0 SDK)

Half-Life: Zombies Ate My Neighbours Multiplayer v2.5 (+ Aura 1.0 SDK)

Full Version

ZAMNHLMP is the best hectic multiplayer experience for Half-Life you will get. Click 'Read more' to see the changelog.

CORRIDORS Build 2002

CORRIDORS Build 2002

Full Version 1 comment

When Grey Source development began in November 2019 with build 1911, Phoenix needed a game to use it with and show off what it's capable of.


this looks weird, in a good way! I'm always happy to see unique mods like this!

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sabianmateinnit Creator

Thanks for the feedback! Also, we're proud to announce that the 2.6 Season 6 update, including Opposing Force skins, maps & weapons, releases today at 3.15 PM GMT!

Reply Good karma+2 votes

looks good so far

Reply Good karma Bad karma+1 vote

Those animations looks pretty good.
Can you share the models?

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someone downvoted this comment. why m8?

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sabianmateinnit Creator

The animations have been created by one of our team members _-=MTB=-_ and he has released the animations on here: Moddb.com

Reply Good karma+2 votes

MMod + this animations - perfect really

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