Lambda Wars (formerly Half-Life 2: Wars) brings the struggle between the human resistance and their Combine overlords to a multiplayer real-time strategy setting. The Lambda Wars beta only requires Alien Swarm installed to play. It features 3 multiplayer game modes: Sandbox, Annihilation and Overrun, showcasing the Rebels and Combine playable factions and a full-fledged RTS interface and HUD. There is also a singleplayer tutorial and a handful of singleplayer missions.

Report article RSS Feed Half-Life 2: Wars Beta 2.0.0 Released!

Major new release - HL2 Wars is now on the Alien Swarm engine! Featuring new maps, new HUD, full tech trees, new game modes and more.

Posted by Ennui on Sep 25th, 2012

We are proud to announce the release of Beta 2.0.0 of Half-Life 2: Wars! It is our first public beta release in nearly two years and introduces a slew of new features and improvements to the mod. HL2 Wars now runs entirely on the Alien Swarm version of the Source engine, meaning it only requires Alien Swarm installed to play (although you MUST legally own Episode 2 in order to play this mod). Beta 2.0 also features a completely redesigned HUD, new building models, new maps, and more variety of units, buildings and abilities than ever before!

Beta 2 is the first major release of the mod that has all of the core multiplayer gameplay fully implemented, so if you haven’t played in a while now is a great time to check it out again. Download Half-Life 2: Wars from Desura now and read on to learn more about what Beta 2 has to offer.


The screenshots above are of hlw_slums, a new map created for Beta 2 by Arietta, the latest addition to our team. Slums is a 1v1 map set in a sprawling urban environment with lots of ruins and cover and paths which makes for a lot of interesting tactical options. It is designed for the primary game mode of HL2 Wars, called Annihilation. He also created the other new map in Beta 2, called hlw_synth, which has a very Alien Swarm feel, taking place in a snowy Arctic installation. Up to four players can duke it out in a free-for-all or team game on Synth. You can see a screenshot of the map below. In addition to the new maps, some older maps have been updated to include support for more game modes.

You can also see from some of our previously released screenshots that we have a brand new HUD and interface. This isn’t news to anybody who has been following our progress over the years, but now it’s ready for public consumption! We have finally gotten rid of our placeholder building models and have full sets of Resistance and Combine structures along with full unit, upgrade, and ability tech trees to go with it. Many units that were not previously playable in multiplayer Half-Life 2: Wars are now fully implemented including Striders, Hunters, and Vortigaunts as well as all the old favorites.

The mod now runs entirely on the Alien Swarm version of the Source engine, meaning you only need Alien Swarm installed to play. However, the game uses HL2: Episode Two content so you must legally own that in order to play HL2 Wars.


Half-Life 2 Wars is only available for download through Desura, a free digital distribution client made for mods and indie games. This is for our convenience as developers - we can easily disseminate updates through Desura rather than having to manually create and distribute patches and client files. You must have Desura installed ONLY to download and patch the mod, but not to play - it will show up in your Steam library as usual.  You do NOT need to have Desura running in order to play.

You must have Alien Swarm installed to play. Visit our website or the help page in-game for more information. Also please remember this is still a beta release and we expect players to encounter a lot of bugs that we have not found yet, especially since our playtesting time has been sorely limited in recent months. Please report bugs, gameplay feedback and balancing suggestions to our community forums to let us know what you think and so that we can fix them in future releases!

We expect to release the first patch (Beta 2.0.1) within a few weeks to address any bugs or balancing issues that are discovered in that time.

Post comment Comments  (0 - 50 of 76)
Mach10chocobo Sep 25 2012, 8:45pm says:

Thanks but no thanks, having one gaming client is enough, I don't need another one.

+20 votes     reply to comment
March_In_August Sep 25 2012, 9:41pm replied:

You only have to use the client for installation and patches. It doesn't need to run in order for you to play the game. It uses your ModDB account as it is run and developed by the same group of people. If you're so inclined you can add the game to your Steam library and launch it from there. Desura is less obtrusive then Steam as it doesn't require any background process or services to be active for you to play your games. So i'm not sure what your issue is with using a great service that comes in at about a whopping 35MB or so installation.

+7 votes     reply to comment
PS2viciado Sep 26 2012, 5:25am replied:

This, personally i dont mind installing desura 1 time, then not having to worry about anything else that evolves mod installation
the mod is 876MB in size btw.

+3 votes     reply to comment
March_In_August Sep 26 2012, 5:29am replied:

I should add that Desura was developed to know the default directory that mods should be installed to, so for Source mods, Desura will install the mod to the correct path by default and the game will show up the next time you start Steam. If your Steam directory is in a different path you can choose to install it there. So you don't even have to bother adding the game manually to Steam like I mentioned above.

+3 votes     reply to comment
Tempest_Wales Sep 26 2012, 5:44pm buried:


So if someone were to just take the mod after it installs to the sourcemod folder, repackage it in a zip file then distribute it, would you A) try to prevent them from distributing it, or B) Provide the damn file yourself rather than looking like fools?

-8 votes     reply to comment
Discrate Sep 27 2012, 11:34am replied:

We already have a zip file up for download..............

+7 votes     reply to comment
Tempest_Wales Sep 26 2012, 2:43pm replied:

Our issue is at having to install YET ANOTHER client.

+2 votes     reply to comment
23-down Sep 27 2012, 10:38am replied:

Agreed. One game client is enough. Never the less good luck with your project. And try the Steam green light thing. I would gladly vote for it.

-2 votes     reply to comment
Kisaraji Sep 25 2012, 8:48pm says:

Awww....but I don't like Desura...please, release it here!

+30 votes     reply to comment
leon.ladisic Sep 26 2012, 2:36am replied:

I'd rather not play this marvelous mod than download another ****** distribution software.

+16 votes     reply to comment
BiLL364 Sep 25 2012, 8:52pm says:

Do you guys intend to release this mod on Steam through Steam Greenlight?
That way you could release patches and updates more easily and maybe even add achievements. There are a few mods out there that are already on the list waiting to be released. Not a huge fan of Desura but thanks a lot for all the hard work!

+16 votes     reply to comment
Sander Sep 26 2012, 3:02pm replied:

We first want to fix the bugs in the coming updates and improve the balance of the game (feedback!). Then see if it is actually worth to put on greenlight and see if there is enough interest. I think we also need to change the name of the mod in case we put it on GreenLight.

+1 vote     reply to comment
SIR_halyavshik Sep 25 2012, 9:00pm says:

you sons of modders , i was about to go to sleep

+11 votes     reply to comment
Mr.Nuke Sep 26 2012, 1:14am replied:

oh man, they're good at this

+4 votes     reply to comment
SIR_halyavshik Sep 25 2012, 9:00pm says:

doublepost :C

-2 votes     reply to comment
Togranigdo Sep 25 2012, 9:00pm says:


+3 votes     reply to comment
QuatroIGN Sep 25 2012, 9:16pm says:

I prefer playing on steam though.

+18 votes     reply to comment
sithpal Sep 25 2012, 9:59pm says:

if this is alien swarm mod...y is it listed as halflife mod?

+1 vote     reply to comment
neronix17 Sep 25 2012, 11:24pm replied:

Because you are legally required to own half life 2 episode 2. And it originally was for that game so...

+5 votes     reply to comment
Discrate Sep 26 2012, 12:12am says:

Regarding Desure, the mod will still show up on steam as usual.

+9 votes     reply to comment
The_Nephillium Sep 26 2012, 12:54am says:

Does this mod work for singleplayer now? I'm to lazy to look :P

-1 votes     reply to comment
warbrand2 Sep 26 2012, 1:53am says:

to bad can't use all buildings in overrun.

+2 votes     reply to comment
warbrand2 Sep 26 2012, 2:16am says:

bug report, infected are errors (al tleast for me) and fast zombies have large chance to spawn under maps.

+5 votes     reply to comment
Sander Sep 26 2012, 3:25am replied:

Seems I forgot to remove the infected option, should actually only be shown if Left 4 Dead is mounted.

+1 vote     reply to comment
warbrand2 Sep 26 2012, 4:03am replied:

i have l4d and l4d2.

+1 vote     reply to comment
Sander Sep 26 2012, 4:26am replied:

Yes, but it does not mount the game by default (controlled in mountlist.txt).

+1 vote     reply to comment
Gameboy555 Sep 26 2012, 4:12pm replied:

yes I was curious about that, who put that there and why? was it valves sample code or someone elses, it seems semi functional as it doesnt seem to want to use the nav graphs

+1 vote     reply to comment
$n!p3r Sep 26 2012, 2:30am says:

you gonna lose some players for not releasing it for steam like usual (.zip, or .exe)...

+2 votes     reply to comment
Sander Sep 26 2012, 3:24am replied:

It is released for Steam and you do not need to run Desura to play the mod, only for installation.

I will also upload a zip to ModDB, but I don't really want to bother creating an installer while we already have Desura.


+10 votes     reply to comment
SabreXT Sep 26 2012, 1:31pm replied:

I tend to prefer zips over exe or client, due to the problems of bad ones putting files and folders I didn't want all over the place.

+7 votes     reply to comment
dudeallen Sep 26 2012, 10:18am says:


*Dies from shock and amazement*

+4 votes     reply to comment
NikolaiChekhov Sep 26 2012, 11:11am says:

Desura is so slow.

+3 votes     reply to comment
jovian95 Sep 26 2012, 11:39am says:

How about i wait for it to not be on desura.

+3 votes     reply to comment
Discrate Sep 26 2012, 12:46pm replied:

We released a zip for it to. You can download it from moddb.

+7 votes     reply to comment
Dr.Goupyl Sep 26 2012, 12:09pm says:

Why so much Desura hating ? Now Desura's speed is fine and once the mod or indie is installed you can quit it and be back on Steam !

They are trying to give you a smart way to update your stuff and you don't like it... Not all mods will be on Greenlight and look at the time it takes.
Ungrateful people are ungrateful.

+4 votes     reply to comment
Pythus Sep 26 2012, 1:39pm says:

can you assume direct control of a soldier like in men of war?

+1 vote     reply to comment
HEVcrab Sep 26 2012, 1:55pm says:

If I order soldiers to throw grenades or fire energy balls, sometimes they do, and sometimes they don't (I have sufficient cost, yes). What does this depend on?

+2 votes     reply to comment
Sander Sep 26 2012, 2:01pm replied:

It does have a short recharge/cooldown time. So it's either that or a bug/unexpected behavior.

+2 votes     reply to comment
HEVcrab Sep 26 2012, 2:34pm says:

Another bug: I cannot play Overrun for rebels, though I'm able to choose Combine as enemies))

+1 vote     reply to comment
HEVcrab Sep 26 2012, 2:42pm replied:

Strangely...when I changed the color of the team to green (from red) it worked)))

+1 vote     reply to comment
Sander Sep 26 2012, 2:59pm replied:

I can't seem to reproduce this.

+1 vote     reply to comment
HEVcrab Sep 26 2012, 3:44pm replied:

For the better) this release made my day (evening at least :)))
You HL2W team could have rightfully taken the name Electronic Arts if it had been free)))

+1 vote     reply to comment
marvelousmatt95 Sep 26 2012, 3:00pm says:

this mod will be the only reason im using desura

+3 votes     reply to comment
SIR_halyavshik Sep 26 2012, 4:58pm replied:

same here

+2 votes     reply to comment
FiredFox3 Sep 26 2012, 4:39pm says:

Thumbs Up!

+2 votes     reply to comment
TheUnabridgedGamer Sep 26 2012, 5:58pm says:

Why do we need to have Episode 2. And while I'm generally against piracy, why specifically "legally". This just gets posted without explanation.

Also, are there finally more than roughly 2-5 units per side now? And more than two buildings per side? Last time I played the mod, you could only play as antlions and your abilities as a commander were significantly limited.

-1 votes     reply to comment
Discrate Sep 27 2012, 1:51am replied:

Refer to the news update for the new features.

+1 vote     reply to comment
WaffleAndy Sep 26 2012, 6:40pm says:

I came.

But I'd also have to agree with the previous comments, why can't it be added on Steam or even here instead of Desura?

+2 votes     reply to comment
WaffleAndy Sep 26 2012, 8:01pm replied:

Oh and I forgot to mention, I crash whenever I tried to launch the mod from Desura :/

+1 vote     reply to comment
WaffleAndy Sep 26 2012, 8:22pm replied:

Nevermind, it automatically fixed itself. I've played it for a bit, and tried out the survival mode (I think that's what it's named) then selected infected, but all I saw were errors rushing towards my group :/

+1 vote     reply to comment
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Released Sep 25, 2012
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