Games like Maniac Path
Games like Maniac Path include The Forest, Momodora: Reverie Under The Moonlight, ULTRAKILL, Lethal Company, and Knock-knock. We matched them by the tags players give Maniac Path on Steam (Side Scroller, Spectacle fighter, Looter Shooter, Horror, and Arena Shooter): closest matches first, and among equally close ones the better-known games.

The Forest
Shared: Horror · Survival Horror · Adventure

Momodora: Reverie Under The Moonlight
Shared: Side Scroller · 2D Platformer · Spectacle fighter

ULTRAKILL
Shared: Spectacle fighter · Arena Shooter · Character Action Game

Lethal Company
Shared: Horror · Survival Horror · Indie

Knock-knock
Shared: Side Scroller · Horror · 2D Platformer

Dying Light
Shared: Horror · Survival Horror · Adventure

Five Nights at Freddy's
Shared: Horror · Survival Horror · Indie

Outlast
Shared: Horror · Survival Horror · Adventure

Poppy Playtime
Shared: Horror · Survival Horror · Indie

The Outlast Trials
Shared: Horror · Survival Horror · PvE

ICEY
Shared: Side Scroller · Spectacle fighter · Adventure

Titan Attacks!
Shared: Side Scroller · Arena Shooter · Bullet Hell

20 Minutes Till Dawn
Shared: Horror · Bullet Hell · Top-Down Shooter

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

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

Escape the Backrooms
Shared: Horror · Survival Horror · Adventure

Silver Pines
Shared: Horror · Side Scroller · Survival Horror

Shift At Midnight
Shared: Horror · Survival Horror · Investigation

Inside the Backrooms
Shared: Horror · Survival Horror · Adventure

Dead by Daylight
Shared: Horror · Survival Horror · Survival

Escape From Duckov
Shared: Looter Shooter · Adventure · Top-Down Shooter

PAYDAY 2
Shared: Looter Shooter · Heist · PvE

Phasmophobia
Shared: Horror · Investigation · Indie

Relic Hunters Zero: Remix
Shared: Looter Shooter · Top-Down Shooter · Bullet Hell