Unrestricted narrative provides the audience with more information than the characters through techniques like foreshadowing danger or revealing backstories. Restricted narrative leaves some details unknown to keep the audience engaged by presenting "enigma codes" for them to solve. Enigma codes can be created through fast editing, flashbacks raising unanswered questions, or important props whose purpose remains unclear. The use of both narrative styles aims to engage audiences in horror films by balancing revealed and unknown information.