Sound effects taken from Payday 2 have undergone a minor upgrade courtesy of the semi-talented staff at Riviera Software. All weapon firing sounds are changed to sounds mixed originating from Payday 2 and mixed with extra LFE and atmospheric stereo layers from other sources. Reloading sounds are not included, though they may be found by themselves in the Archives section of the site.
The Payday 2 Mixtape is currently being released for Counter-Strike Global Offensive, Counter-Strike Source, Left 4 Dead, and Left 4 Dead 2. You can also find the original Payday: The Heist sound mod available for the first Left 4 Dead game on Mateoski's page here.