Games like PIEN & PAON plus
Games like PIEN & PAON plus include Portal 2, Bendy and the Dark Revival, Atomic Heart, Resident Evil Requiem, and Ratchet & Clank: Rift Apart. We matched them by the tags players give PIEN & PAON plus on Steam (Action, Adventure, Action-Adventure, 3D Platformer, and Horror): closest matches first, and among equally close ones the better-known games.

Portal 2
Shared: Singleplayer · First-Person · 3D Platformer

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

Atomic Heart
Shared: Adventure · Action · Action-Adventure

Resident Evil Requiem
Shared: Action · Horror · Action-Adventure

Ratchet & Clank: Rift Apart
Shared: Adventure · Action-Adventure · 3D Platformer

Five Nights at Freddy's: Security Breach
Shared: Horror · Singleplayer · First-Person

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

The Beast Inside
Shared: Adventure · Horror · Action

Resident Evil Village
Shared: Action · Horror · First-Person

Grand Theft Auto V Legacy
Shared: Action · Adventure · First-Person

Outlast
Shared: Horror · First-Person · Adventure

The Forest
Shared: Horror · Adventure · Action

Necromunda: Hired Gun
Shared: Action · Adventure · Action-Adventure

Hello Neighbor
Shared: Horror · First-Person · Action-Adventure

Sonic Frontiers
Shared: Adventure · Action · 3D Platformer

Rise of the Tomb Raider™
Shared: Action · Adventure · Action-Adventure

Tomb Raider Game of the Year
Shared: Action · Adventure · Singleplayer

Marvel’s Spider-Man Remastered
Shared: Action · Adventure · Action-Adventure

Pumpkin Jack
Shared: Action · Adventure · 3D Platformer

Escape the Backrooms
Shared: Horror · First-Person · Adventure

Resident Evil 7 Biohazard
Shared: Horror · First-Person · Singleplayer

SILENT HILL: Townfall
Shared: Adventure · Action · Horror

Amnesia: Rebirth
Shared: Action-Adventure · First-Person · Adventure

Kao the Kangaroo: Round 2 (2003 re-release)
Shared: Adventure · Action · 3D Platformer