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Lambda Wars

Game overview

Lambda Wars

Vortal Storm · Dec 5, 2014

Lambda Wars is a free standalone multiplayer Source Engine modification set in the Half-Life 2 universe that brings the war between mankind and their brutal Combine overlords to a traditional real-time strategy (RTS) setting.

Free to Play Strategy RTS Multiplayer Mod
Last tracked players
10
Recorded peak
49
24-hour change
Unavailable
Steam reviews
94.1% positive
3,291 reviews · via SteamSpy

Delayed observation · last tracked . Values marked unavailable are not estimated. Recorded peak is the highest player count observed by SteamIQHQ; earlier records may be outside our coverage.

About this game Read the full description
Lambda Wars is a free multiplayer Source Engine modification for Alien Swarm set in the Half-Life 2 universe that brings the war between mankind and their brutal Combine overlords to a traditional real-time strategy (RTS) setting. Lead the uprising as a commander of the Resistance or crush the rebellion as an overlord of the Combine, with both factions featuring a full host of units, abilities, buildings, research and defenses. Lambda Wars features full-fledged RTS gameplay and a robust RTS interface and is focused on multiplayer but strategic AI opponents and dedicated singleplayer missions are also included.

features


  • Classic real-time strategy (RTS) gameplay in the Half-Life 2 world
  • Multiplayer support and game lobby including spectator mode
  • Wide variety of maps for up to 8 human or AI players
  • Play as either Combine or Resistance (and also Antlions in Sandbox mode)
  • Full unit tech tree that allows you to command everything from Manhacks to Striders
  • Full-fledged RTS interface and HUD with everything from minimap and fog of war to unit and production building groups
  • Build production and research facilities to requisition better units and unlock abilities and upgrades
  • Defensive structures, turrets and mines help defend your headquarters and vital resource points
  • Multiple game modes
  • Singleplayer missions, tutorial map and offline AI skirmish mode
Media gallery 12 screenshots · 0 videos
Lambda Wars game capsule image

Screenshots

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And 4 more screenshots...

Player activity

Concurrent players over the last 48 hours.

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Latest news

All news on Steam ↗
Lambda Wars patch (unversioned) Lambda Wars Patch 4th March 2021 (1.1) Lambda Wars has been released!
System requirements Windows

Windows

Minimum

Minimum:
  • OS *: Windows 7
  • Processor: Dual core from Intel or AMD at 2.8 GHz / Quad-Core Intel at 1.33 GHz
  • Memory: 1 GB RAM
  • Graphics: Intel HD Graphics, nVidia Geforce 8600GT, AMD Radeon HD2600 or better
  • DirectX: Version 9.0c
  • Storage: 4 GB available space
  • Sound Card: DirectX 9.0c compatible sound card
  • Additional Notes: These are the minimum requirements to be able to run on lowest settings

Recommended

Recommended:
  • Memory: 3 GB RAM
  • Additional Notes: Being able to go easy on us devs for all the bugs and glitches :(
Game details Languages, features & support
Publisher
Vortal Storm
Brazilian rating
14
Steam Germany rating
16
Content warning
Lambda Wars includes violence throughout the game.
Achievements
21
Features
Single-player, Multi-player, PvP, Online PvP, Co-op, Online Co-op, Steam Achievements, Steam Cloud, Stats, Family Sharing
Languages
English*, German, Russian, Spanish - Spain, Korean, Romanian, Portuguese - Portugal, Portuguese - Brazil, French, Hungarian, Ukrainian, Spanish - Latin America, Czech
*languages with full audio support
Compatibility & accessibility Steam Deck, controllers & access features

Can I Play This?

Steam declarations and Valve's Steam Deck compatibility result. Missing data is shown as unknown, never unsupported.

Sources fresh
Native Steam builds
Windows: unknown
macOS: unknown
Linux: unknown
Steam Deck
playable
Valve compatibility test
The on-screen keyboard may need to be opened manually.
Input
Controller support: unknown
Structured language support (13)
LanguageInterfaceFull audioSubtitles
EnglishYesYesNo
GermanYesNoNo
RussianYesNoNo
Spanish - SpainYesNoNo
KoreanYesNoNo
RomanianYesNoNo
Portuguese - PortugalYesNoNo
Portuguese - BrazilYesNoNo
FrenchYesNoNo
HungarianYesNoNo
UkrainianYesNoNo
Spanish - Latin AmericaYesNoNo
CzechYesNoNo
Steam store page fresh · checked 2026-11-03 PCGamingWiki technical notes External link only; SteamIQHQ does not ingest PCGamingWiki content.
Achievement progress Rarity & completion patterns

Achievement Difficulty

Global unlock percentages are not exact completion or retention metrics.

Steam source
Achievements measured
21
Hunter score
71.5 / 100
SteamIQHQ inference from rarity and count
Progression analysis
Achievement rarity is available, but milestone order is not defensible.

Rarest achievements

Wrecking Ball 2.7%
Annihilation Gladiator 2.8%
Let's Watch Some Fireworks Go Kaboom! 2.8%
Friendly Fire! 3.1%
Vandalism 3.1%

Difficulty distribution

Ultra rare (<1%)0
Very rare (1–5%)11
Rare (5–20%)9
Uncommon (20–50%)1
Common (50%+)0
Observed Nov 12, 2026 19:51 UTC · fresh
More analysis Activity patterns, updates & developer tools

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Genre Benchmarks

Player Count Top 56%

Activity Heatmap

UTC+0 (Your Timezone)
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Avg Activity
10
Active Hours
9%
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Developer Analytics

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Frequently Asked Questions

What genre is Lambda Wars?
Lambda Wars is a Strategy, Free To Play game.
Who developed Lambda Wars?
Lambda Wars was developed by Vortal Storm and published by Vortal Storm.
What platforms does Lambda Wars support?
Available on Steam for Windows.

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