Lambda Fortress

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This mod for Source has been released! Download it now.


Lambda Fortress (shortly LF) is a cooperative crossover mod between Half-Life 2 and Team Fortress 2. Play as Team Fortress 2 classes through Half-Life 2 campaign and more in this ridiculous crossover between two radically different FPS universes. Currently the mod is in development stage and a lot of bugs are not fixed yet.


Things are not looking up for the resistance when another wave of portal storms creates a dimensional breach leading into an entirely new world. Two identical teams of mercenaries that come from this new world waste no time choosing a side in the conflict as the RED team members dedicate themselves to protecting their home world from Combine's threat while the treacherous BLU team joins the winning side by allying themselves with Combine forces.


  • Lambda Fortress uses 2007 Team Fortress 2 assets, so you still can see cutten features there (grenades, etc.). It also means that a lot of bugs fixed in nowadays TF2 exists there and a lot of game mechanics (inventory, airblast for Pyro, ability to move Engineer's buidlings) aren't added.

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