It's a remake, not a remaster in the definition that you are thinking of. Vicarious Visions did not use any of the code, likely to the fact that either it was u

It's a remake, not a remaster in the definition that you are thinking of. Vicarious Visions did not use any of the code, likely to the fact that either it was unusable or they did not ever have the source code. N. Sane was done in Alchemy Engine, not Unreal Engine 4 (unlike Reignited), although VV is likely following suit with their upcoming project.