Games like The 7th Circle - Endless Nightmare
Games like The 7th Circle - Endless Nightmare include Darkest Dungeon®, Lunacid, Resident Evil 7 Biohazard, Outlast 2, and Trepang2. We matched them by the tags players give The 7th Circle - Endless Nightmare on Steam (RPG, Dungeon Crawler, Violent, Gore, and Horror): closest matches first, and among equally close ones the better-known games.

Darkest Dungeon®
Shared: Dungeon Crawler · RPG · Turn-Based Combat

Lunacid
Shared: Dungeon Crawler · RPG · First-Person

Resident Evil 7 Biohazard
Shared: Horror · Gore · Singleplayer

Outlast 2
Shared: Horror · Gore · Singleplayer

Trepang2
Shared: Singleplayer · Gore · Horror

Vampire: The Masquerade® - Bloodlines™ 2
Shared: Gore · RPG · Violent

Mortal Sin
Shared: Dungeon Crawler · RPG · First-Person

Resident Evil Village
Shared: Horror · Singleplayer · Gore

Outlast
Shared: Horror · Gore · First-Person

Legend of Grimrock
Shared: RPG · Dungeon Crawler · Indie

Look Outside
Shared: RPG · Horror · Gore

People Playground
Shared: Gore · Violent · Singleplayer

Dead by Daylight
Shared: Horror · Gore · Violent

CARRION
Shared: Gore · Horror · Violent

Slasher's Keep
Shared: Dungeon Crawler · RPG · First-Person

Legend of Grimrock 2
Shared: RPG · Dungeon Crawler · First-Person

Middle-earth: Shadow of War
Shared: RPG · Singleplayer · Violent

Granny
Shared: Horror · Singleplayer · Violent

Buckshot Roulette
Shared: Horror · Singleplayer · First-Person

DOOM Eternal
Shared: Gore · Violent · Singleplayer

Battle Chasers: Nightwar
Shared: RPG · Dungeon Crawler · Singleplayer

Ready or Not
Shared: Singleplayer · Horror · Violent

Maneater
Shared: Violent · RPG · Gore

Cyberpunk 2077
Shared: RPG · Singleplayer · First-Person