Project Valkyrie is a steadily expanding set of ReShades that enhances Assassin's Creed Valhalla's already good visuals with, depending on which ReShade preset you use, more vivid, realistic, or cinematic looks. Each preset also adds tons of optional, fine-tuned cinematic effects, including film-grade depth-of-field, film grain, letterboxing (black bars), chromatic aberration and anamorphic lens distortion (to simulate a camera lens), and enhanced bloom and lens dirt.
Four (4) ReShade presets are bundled in at launch. You'll be able to pick from one very gritty, Dark-Souls-3-inspired preset, one natural-toned preset, with vividness closer to the vanilla game but color balanced, and one vivid preset with stunning (yet balanced) colors. An additional preset is included which is quite close to the vanilla color scheme with simply less washed out colors and lighting and only slight color grading.
I'll be adding many more throughout the game's life-cycle. Each preset color corrects the game's sometimes green or purple tint.