Games like Project X
Games like Project X include Mad Father, Look Outside, Tales of the Black Forest, BlazBlue Entropy Effect, and The Last of Us™ Part I. We matched them by the tags players give Project X on Steam (Anime, Shooter, Pixel Graphics, Zombies, and 2D): closest matches first, and among equally close ones the better-known games.

Mad Father
Shared: Anime · Pixel Graphics · Horror

Look Outside
Shared: Pixel Graphics · Horror · 2D

Tales of the Black Forest
Shared: Pixel Graphics · Anime · Horror

BlazBlue Entropy Effect
Shared: 2D · Anime · Action-Adventure

The Last of Us™ Part I
Shared: Zombies · Shooter · Horror

Terraria
Shared: Pixel Graphics · 2D · Adventure

Angels of Death
Shared: Pixel Graphics · 2D · Horror

The Witch's House MV
Shared: Pixel Graphics · 2D · Horror

Five Nights at Freddy's: Into the Pit
Shared: Pixel Graphics · Horror · 2D

Dungeon Munchies
Shared: Pixel Graphics · Anime · 2D

Left 4 Dead 2
Shared: Zombies · Shooter · Horror

The Final Station
Shared: Pixel Graphics · 2D · Zombies

Rabi-Ribi
Shared: Anime · Pixel Graphics · Action-Adventure

OMORI
Shared: Pixel Graphics · 2D · Horror

Dying Light
Shared: Zombies · Horror · Open World

ANIMAL WELL
Shared: Pixel Graphics · 2D · Horror

DayZ
Shared: Zombies · Shooter · Open World

Atomic Heart
Shared: Action-Adventure · Shooter · Horror

Momodora: Moonlit Farewell
Shared: Anime · Pixel Graphics · 2D

Lost Ruins
Shared: Anime · Pixel Graphics · 2D

Drova - Forsaken Kin
Shared: Pixel Graphics · 2D · RPG

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

Pocket Mirror ~ GoldenerTraum
Shared: Pixel Graphics · Anime · Horror

Ib
Shared: Pixel Graphics · Horror · 2D