Games like Smile Dog
Games like Smile Dog include KinitoPET, Firework, No, I'm not a Human, Mouthwashing, and Papers, Please. We matched them by the tags players give Smile Dog on Steam (Simulation, Horror, Psychological Horror, Retro, and 1990's): closest matches first, and among equally close ones the better-known games.

KinitoPET
Shared: Horror · Psychological Horror · Retro

Firework
Shared: Horror · Psychological Horror · 2D

No, I'm not a Human
Shared: Horror · Psychological Horror · Multiple Endings

Mouthwashing
Shared: Horror · Psychological Horror · Retro

Papers, Please
Shared: Simulation · Multiple Endings · Retro

Five Nights at Freddy's
Shared: Horror · Psychological Horror · Simulation

Lobotomy Corporation | Monster Management Simulation
Shared: Psychological Horror · Simulation · Horror

The Test
Shared: Simulation · Psychological Horror · Multiple Endings

MOLE
Shared: Simulation · Horror · Psychological Horror

OMORI
Shared: Psychological Horror · Horror · Multiple Endings

Buddy Simulator 1984
Shared: Psychological Horror · Horror · Retro

MiSide
Shared: Psychological Horror · Horror · Atmospheric

Photomaly
Shared: Simulation · Horror · Psychological Horror

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

The Test: Final Revelation
Shared: Simulation · Horror · Psychological Horror

[Chillas Art] Parasocial
Shared: Horror · Psychological Horror · Immersive Sim

Shift At Midnight
Shared: Horror · Retro · Simulation

Kiosk
Shared: Horror · Psychological Horror · Immersive Sim

s.p.l.i.t
Shared: Simulation · Psychological Horror · Atmospheric

Home Safety Hotline
Shared: Horror · Simulation · 1990's

Phasmophobia
Shared: Horror · Psychological Horror · Supernatural

SILENT HILL 2
Shared: Horror · Psychological Horror · Atmospheric

The Test: Hypothesis Rising
Shared: Simulation · Horror · Multiple Endings

Stay Out of the House
Shared: Horror · Retro · Immersive Sim