If you're currently wiping out hordes of mutant monstrosities inKilling Floor 2, don't worry about losing your stats when the game moves out of Early Access.
The developer confirmed that player records would cross over at E3 yesterday, in an interview. Anything you unlock will be yours into version 1.0 and beyond.
Killing Floor 2 is currently in its Beta stage, steadily receiving new updates that add new content and improve core mechanics. Theadded some enhancements to the melee system, including new attack moves for the knife, katana and 'pulveriser', plus improvements to the block and parry systems.
Tripwire's current goal is to release Killing Floor 2 before the end of 2015.