Games like Lucifer Within Us
Games like Lucifer Within Us include Phasmophobia, The Case of the Golden Idol, L.A. Noire, Strange Horticulture, and Inscryption. We matched them by the tags players give Lucifer Within Us on Steam (Investigation, Detective, Demons, Experimental, and Dark): closest matches first, and among equally close ones the better-known games.

Phasmophobia
Shared: Investigation · Detective · Dark

The Case of the Golden Idol
Shared: Detective · Investigation · Point & Click

L.A. Noire
Shared: Detective · Investigation · Noir

Strange Horticulture
Shared: Detective · Dark · Investigation

Inscryption
Shared: Dark · Story Rich · Experimental

Cyber Manhunt 2: New World - The Hacking Simulator
Shared: Detective · Investigation · Point & Click

Disco Elysium - The Final Cut
Shared: Detective · Point & Click · Isometric

Duck Detective: The Secret Salami
Shared: Investigation · Detective · Noir

No Case Should Remain Unsolved
Shared: Investigation · Point & Click · Detective

Tales of the Neon Sea
Shared: Investigation · Detective · Point & Click

Kathy Rain: Director’s Cut
Shared: Detective · Point & Click · Investigation

Hellblade: Senua's Sacrifice
Shared: Female Protagonist · Dark · Story Rich

This Bed We Made
Shared: Investigation · Female Protagonist · Detective

Demonologist
Shared: Investigation · Dark · Demons

Paradise Killer
Shared: Investigation · Detective · Female Protagonist

Her Story
Shared: Investigation · Detective · Point & Click

Fran Bow
Shared: Point & Click · Dark · Story Rich

NORCO
Shared: Point & Click · Investigation · Dark

The Roottrees are Dead
Shared: Detective · Investigation · Point & Click

Kathy Rain 2: Soothsayer
Shared: Investigation · Detective · Point & Click

Sherlock Holmes: Crimes and Punishments
Shared: Detective · Investigation · Point & Click

The Cat Lady
Shared: Point & Click · Female Protagonist · Dark

Roman's Christmas / 罗曼圣诞探案集
Shared: Detective · Investigation · Point & Click

Buckshot Roulette
Shared: Dark · Strategy · Horror