Valve notes that while these mods "must be free," their creators will be able to publish them on Steam. Up to this point major Team Fortress 2 mods have existed in a bit of a gray area over the years.

Undead fortress is a simple and pure first-person shooter game that tests players' shooting reflexes and upgrade combinations.Players take on the role of a survivor in a post-apocalyptic world ...

Surprise! Valve's just released a massive update to the Source SDK, adding "all" the Team Fortress 2 client and server game code. Valve said the update lets players build entirely new games from ...

Outpost 2: Orbital Siege (provisional) is an FPS, real-time strategy, and tower defense game which features changes like mobile fortress revolution, evolving from static towers to a movable ...

Dwarf Fortress, the dazzlingly complex colony sim that was free for almost 20 years before becoming a massive hit on Steam, has sold 1 million copies since it tunnelled onto the platform.

Now, the entirety of Team Fortress 2 (TF2) client and server game code, a boon for modders and fixers, is also being released. That source code allows for more ambitious projects than have been ...

The Fortress is a dark fantasy dungeon crawler with turn-based combat, mixing strategy and risk. Choose a class, delve into cursed chambers, roll dice to fight brutal enemies, and grab loot.

Games FPS Games Team Fortress 2 Valve adds "all the Team Fortress 2 client and server game code" to its Source mod tools, letting modders "build completely new games based on TF2" and publish them ...