A third video developer diary for Killing Floor 2 offers more on development of Tripwire Interactive's upcoming first-person shooter sequel. The clip includes alpha gameplay footage, and they note that all of this is taken from the Windows PC edition. Here's a description of the clip:

Today, Tripwire Interactive returns with the release of the latest installment in its multi-part developer diary series for the highly anticipated PC and PlayStation®4 title, KILLING FLOOR 2. In a continuation of Weapons and Perks: Part 1, the newest video, Weapons and Perks: Part 2 takes aim at what KILLING FLOOR 2 has in store in its heavy arsenal. For starters, the team pairs each perk with a specialized base weapon and grenade. Players can then customize their specific perk skills as they progress in the game to suit their Zed-slaying style. With Tripwire Interactive’s superb track record of creating realistic, fast-paced action weapons, they’ve worked hard to perfect the art of gratifying weaponry in KILLING FLOOR 2.

Blending functionality and realism with high-frame rate animations, KILLING FLOOR 2 features weapon animations that clock in blazing fast at over 200 frames-per-second compared to the average of 30 FPS found in most First Person Shooters. With the return of Zed Time, which has been enhanced for KILLING FLOOR 2, players will be seeing nothing but red!