Valve has just unveiled a groundbreaking update to the Source SDK, integrating the complete Team Fortress 2 client and server game code. This monumental update empowers players to craft entirely new games from the ground up, offering unprecedented freedom to modders. Unlike modifications through the Steam Workshop or local content, this update allows for extensive modifications, extensions, and even complete rewrites of Team Fortress 2 in virtually any conceivable way.
However, there's a catch: creations made using this update cannot be sold. Any mods or spin-off content must be released for free on a non-commercial basis. Despite this, Valve is enabling creators to publish their work on the Steam Store, where these creations will appear as new games in the Steam game list.
Valve emphasized the importance of the TF2 community's contributions in a blog post, stating, "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." They urged mod makers to respect this connection and not to create mods aimed at profiting from the efforts of Workshop contributors. Valve hopes that many mods will continue to allow players access to their TF2 inventory, where appropriate.
In addition to the Source SDK update, Valve announced a significant update to all its multiplayer back-catalog Source engine titles. This update includes 64-bit binary support, scalable HUD/UI, prediction fixes, and numerous other enhancements, benefiting not only Team Fortress 2 but also Day of Defeat: Source, Half-Life 2: Deathmatch, Counter-Strike: Source, and Half-Life: Deathmatch: Source.
This news comes on the heels of the release of the seventh and final update to the Team Fortress 2 comic series in December, after a seven-year wait. These comics have been a rich source of lore and character development for fans, underscoring Valve's ongoing commitment to one of its most beloved franchises.