Games like Nightwalker 2
Games like Nightwalker 2 include Poppy Playtime, Outlast, The Forest, Escape the Backrooms, and Darkwood. We matched them by the tags players give Nightwalker 2 on Steam (Adventure, Horror, Survival Horror, Psychological Horror, and Action): closest matches first, and among equally close ones the better-known games.

Poppy Playtime
Shared: Horror · Survival Horror · Psychological Horror

Outlast
Shared: Horror · Survival Horror · Psychological Horror

The Forest
Shared: Horror · Adventure · Survival Horror

Escape the Backrooms
Shared: Horror · Psychological Horror · Survival Horror

Darkwood
Shared: Horror · Adventure · Survival Horror

SOMA
Shared: Horror · Psychological Horror · Survival Horror

Lethal Company
Shared: Horror · Survival Horror · Psychological Horror

Inside the Backrooms
Shared: Horror · Survival Horror · Psychological Horror

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

Little Nightmares II
Shared: Adventure · Horror · Psychological Horror

Resident Evil 7 Biohazard
Shared: Horror · Survival Horror · Psychological Horror

Amnesia: Rebirth
Shared: Horror · Adventure · Action-Adventure

Five Nights at Freddy's: Security Breach
Shared: Horror · Survival Horror · Adventure

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

SILENT HILL: Townfall
Shared: Adventure · Horror · Psychological Horror

Little Nightmares
Shared: Horror · Adventure · Atmospheric

SILENT HILL f
Shared: Horror · Psychological Horror · Survival Horror

Outlast 2
Shared: Horror · Survival Horror · Psychological Horror

Backrooms: Escape Together
Shared: Horror · Psychological Horror · Survival Horror

The Beast Inside
Shared: Adventure · Horror · Survival Horror

Five Nights at Freddy's: Secret of the Mimic
Shared: Horror · Adventure · Action

Sons Of The Forest
Shared: Survival Horror · Horror · Adventure

The Outlast Trials
Shared: Horror · Survival Horror · Psychological Horror

Hello Neighbor 2
Shared: Adventure · Horror · Action-Adventure