Surprise! Valve has unleashed a massive update to the Source SDK, granting full access to the Team Fortress 2 client and server game code. This unprecedented move allows players to build entirely new games using TF2's source code. Unlike Steam Workshop modifications, this update empowers modders to fundamentally alter, expand, and even completely rewrite Team Fortress 2.
While commercialization is prohibited—meaning any created mods or spin-off content must be free and non-commercial—creations can be published on the Steam Store, appearing as distinct games within the Steam game library.
Valve's decision stems from a deep respect for the TF2 community's significant contributions. The blog post explains: "Players have a lot of investment in their TF2 inventories, and Steam Workshop contributors have created a lot of that content. The majority of items in the game now are thanks to the hard work of the TF2 community. To respect that, we're asking TF2 mod makers continue to respect that connection, and to not make mods that have the purpose of trying to profit off Workshop contributors' efforts. We're hoping that many mods will continue to allow players access their TF2 inventory, if this makes sense for the mod."
This update also extends to Valve's entire back-catalog of multiplayer Source engine titles, including a substantial upgrade to 64-bit binary support, scalable HUD/UI, prediction fixes, and numerous other improvements across Team Fortress 2, DoD:S, HL2:DM, CS:S, and HLDM:S.
Following seven years of anticipation, December saw the release of the seventh and final update to the Team Fortress 2 comic series. These comics have served not only as a rich source of lore and character development for fans, but also as a testament to Valve's enduring commitment to one of its most iconic franchises.