If you loved Deadly Friend, try Swamp Thing
A bridge between a film you've already seen and one most people haven't. Here's what they share, and what the second one does that the first one doesn't.
What they share
Both films are directed by Wes Craven, and they both carry the body horror mood tag, and they sit in Horror / Science Fiction territory. If that's the register that drew you to Deadly Friend, the second film will land in a comparable space — through a different lens.
body horror
What Swamp Thing is
Louisiana bayou. Dawn mist. A single gunshot. Scientist transforms. Arcs of light sear lab walls. A woman flees corporate hunters in the mossy dark. Craven directs schlock with a wink.
Ask 
ChatGPT
Claude
Grok
Le Chat
Perplexity
for a deeper bridge
ChatGPTClaudeGrokLe ChatPerplexity