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Valve Unleashes Team Fortress 2 Code: Modders Celebrate

By DanielMay 12,2025

Valve has just unveiled a groundbreaking update to the Source SDK, releasing the entire Team Fortress 2 (TF2) client and server game code. This monumental update empowers players to create entirely new games from the ground up, using the source code as their canvas. Unlike modifications through the Steam Workshop or local content, this new access allows modders the freedom to alter, expand, and even completely transform Team Fortress 2 in countless innovative ways.

It's important to note, however, that any creations resulting from this update must be distributed for free on a non-commercial basis. Valve has stated that while monetization is off the table, these new games can be published directly on the Steam Store, where they will appear alongside other titles in the Steam game list.

Valve emphasized the importance of respecting the community's contributions to TF2, particularly the vast array of items crafted by Steam Workshop creators. "Players have a lot of investment in their TF2 inventories, and Steam Workshop contributors have created a lot of that content," Valve shared in a blog post. They encourage mod makers to honor this legacy by not creating mods aimed at profiting from the efforts of Workshop contributors. Additionally, Valve hopes that many mods will continue to integrate players' existing TF2 inventories, where feasible.

In a broader move, Valve is also rolling out a significant update to all its multiplayer Source engine titles. This includes enhancements such as 64-bit binary support, scalable HUD/UI, prediction fixes, and numerous other improvements that will benefit not only TF2 but also Day of Defeat: Source, Half-Life 2: Deathmatch, Counter-Strike: Source, and Half-Life Deathmatch: Source.

This update comes on the heels of the seventh and final installment of the Team Fortress 2 comic series, released in December after a seven-year wait. These comics have served as a rich source of lore and character development, reinforcing Valve's ongoing commitment to one of its most beloved franchises.

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