Games like BUG
Games like BUG include Poppy Playtime, Dark Deception, Ultimate Custom Night, Escape the Backrooms, and Dead Space. We matched them by the tags players give BUG on Steam (Psychological Horror, Free to Play, Horror, Incremental, and Action): closest matches first, and among equally close ones the better-known games.

Poppy Playtime
Shared: Horror · Free to Play · Psychological Horror

Dark Deception
Shared: Free to Play · Horror · Psychological Horror

Ultimate Custom Night
Shared: Free to Play · Horror · Singleplayer

Escape the Backrooms
Shared: Horror · Psychological Horror · Action

Dead Space
Shared: Horror · Psychological Horror · Singleplayer

Aimlabs
Shared: Free to Play · Action · Simulation

The Sims™ 4
Shared: Free to Play · Simulation · Life Sim

Chinese Parents
Shared: Psychological Horror · Casual · Simulation

War Thunder
Shared: Free to Play · Action · Simulation

Where Winds Meet
Shared: Free to Play · Singleplayer · Action-Adventure

Getting Over It with Bennett Foddy
Shared: Psychological Horror · Horror · Singleplayer

Cookie Clicker
Shared: Incremental · Horror · Casual

In Sound Mind
Shared: Psychological Horror · Horror · Action

[Chillas Art] The Convenience Store
Shared: Psychological Horror · Horror · Casual

Halo Infinite
Shared: Free to Play · Action · Singleplayer

We Were Here
Shared: Free to Play · Horror · Psychological Horror

Ready or Not
Shared: Horror · Psychological Horror · Shooter

KovaaK's
Shared: Action · Simulation · Shooter

Hamster Hunter
Shared: Psychological Horror · Horror · Action-Adventure

Once Human
Shared: Free to Play · Action · Simulation

SILENT HILL f
Shared: Psychological Horror · Horror · Action

MiSide
Shared: Psychological Horror · Horror · Singleplayer

Pacify
Shared: Horror · Psychological Horror · Action

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