Redfall Cross-Play, Cross-Save, And Co-Op Progression Explained - GameSpot

Yes, Redfall has cross-play, though it has one minor extra step if you want to utilize it.

Ubisoft – Working Casual

Redfall, OT, What We Slew in the Shadows OT, Page 62

Does anyone know if progression will be shared between PC and Xbox

Is Redfall Crossplay? - The Escapist

Redfall, OT, What We Slew in the Shadows OT, Page 62

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All Heroes and Abilities in Redfall

Ubisoft – Working Casual

News - April, 2022