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Lovingly referred to as the Swiss Army Knife of PC gaming, Special K does a bit of everything. It is best known for fixing and enhancing graphics, its many detailed performance analysis and correction mods, and a constantly growing palette of tools that solve a wide variety of issues affecting PC games.
Special K is an extensive game modifying framework allowing for various forms of in-depth tweaking of a game. The focus is primarily on the graphics pipeline but the tool also includes features such as input device blocking/configuring, window and volume management, enhancements for some of the in-game functionality of Steam, and more. On top of this the framework includes various game-specific changes and optimizations that its developer Kaldaien has come across and fixed over the years.
If you are a new user, check out Global (system-wide) or Local (game-specific) for instructions on how to install and use Special K in game(s).
Check out Frequently Asked Questions for more information about what Special K is and what it can do.
Feel free to join the community on either of the below places!