The Krauser Mod (most popularly made by and later versions by ‘Darknessvaltier’ & ‘RE4 Tweaks Team’ ) replaces the main character model (Leon S. Kennedy) with Jack Krauser — Leon’s former partner and the game’s knife-wielding antagonist. Unlike simple skin swaps, advanced versions of this mod give Krauser his full assignment: Ada and Mercenaries moveset directly into the main campaign.