Games like Silent Descent
Games like Silent Descent include Outlast, Poppy Playtime, Amnesia: The Dark Descent, Resident Evil 7 Biohazard, and Little Nightmares II. We matched them by the tags players give Silent Descent on Steam (Action, Adventure, Indie, Horror, and Psychological Horror): closest matches first, and among equally close ones the better-known games.

Outlast
Shared: Horror · Psychological Horror · Atmospheric

Poppy Playtime
Shared: Horror · Singleplayer · Puzzle

Amnesia: The Dark Descent
Shared: Horror · Psychological Horror · Puzzle

Resident Evil 7 Biohazard
Shared: Horror · Singleplayer · Action

Little Nightmares II
Shared: Adventure · Horror · Puzzle

Little Nightmares
Shared: Adventure · Horror · Atmospheric

The Beast Inside
Shared: Adventure · Horror · Action

Layers of Fear (2016)
Shared: Horror · Psychological Horror · Indie

SOMA
Shared: Horror · Psychological Horror · Atmospheric

Outlast 2
Shared: Horror · Psychological Horror · Singleplayer

Sally Face - Episode One
Shared: Indie · Psychological Horror · Horror

Firewatch
Shared: Adventure · Atmospheric · Indie

Bendy and the Dark Revival
Shared: Action · Horror · Adventure

Among the Sleep - Enhanced Edition
Shared: Indie · Horror · Adventure

Bendy and the Ink Machine
Shared: Horror · Puzzle · Singleplayer

Still Wakes the Deep
Shared: Horror · Psychological Horror · Adventure

Garten of Banban
Shared: Horror · Psychological Horror · Singleplayer

Fran Bow
Shared: Psychological Horror · Adventure · Horror

Ready or Not
Shared: Horror · Singleplayer · Action

Spooky's Jump Scare Mansion: HD Renovation
Shared: Adventure · Indie · Horror

Resident Evil Village
Shared: Horror · Action · Singleplayer

Lucius
Shared: Adventure · Horror · Indie

Escape the Backrooms
Shared: Horror · Psychological Horror · Adventure

ROUTINE
Shared: Psychological Horror · Adventure · Singleplayer