Lambda Fortress

Lambda Fortress is the iconic mod that brings the Team Fortress 2 mercenaries into Half-Life 2 and other Source campaigns for singleplayer & co-op play. Now on Steam!

Type
Mod
Developer
CoaXioN
Publisher
CoaXioN
Last Updated
12/6/2025
Steam App Id
3564500
Platforms
  • Windows
  • Mac
  • Linux

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About Lambda Fortress

Lambda Fortress is an Action and Free to Play Mod developed by CoaXioN. It was released on the Steam Store by CoaXioN. Lambda Fortress can be played and ran on both Windows and Linux systems. At the moment, there is no confirmed information regarding Steam Deck support for this mod app.

According to Steam’s category system, Lambda Fortress supports the following features:

  • Steam Workshop
  • Single-player
  • Online Co-op
  • HDR available
  • Co-op
  • Steam Timeline
  • Steam Achievements
  • Steam Cloud
  • Captions available
  • Multi-player
  • Partial Controller Support
  • Includes level editor
  • Stats
  • Includes Source SDK
  • LAN Co-op

Media & Sceenshots

Explore the featured video and screenshots from Lambda Fortress featured in the Steam Store.

Lambda Fortress Featured Screenshot #1

Frequently Asked Questions

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