Games like Project N3T
Games like Project N3T include Liars Bar, Garry's Mod, Portal, SUPERHOT, and Portal 2. We matched them by the tags players give Project N3T on Steam (Casual, Puzzle, FPS, 3D, and Indie): closest matches first, and among equally close ones the better-known games.

Liars Bar
Shared: Casual · Indie · FPS

Garry's Mod
Shared: Casual · FPS · First-Person

Portal
Shared: Puzzle · First-Person · Sci-fi

SUPERHOT
Shared: FPS · Indie · Puzzle

Portal 2
Shared: Puzzle · First-Person · Singleplayer

Donut County
Shared: Casual · Puzzle · Indie

Zup! S
Shared: Casual · Puzzle · Indie

Half-Life 2
Shared: FPS · Sci-fi · First-Person

Poppy Playtime
Shared: Puzzle · First-Person · Singleplayer

Titanfall® 2
Shared: FPS · First-Person · Sci-fi

How to Fish
Shared: Indie · First-Person · FPS

Halo Infinite
Shared: FPS · First-Person · Free to Play

Cyberpunk 2077
Shared: FPS · Sci-fi · Futuristic

VLADiK BRUTAL
Shared: FPS · First-Person · Casual

Moncage
Shared: Casual · Puzzle · Indie

Black Mesa
Shared: FPS · First-Person · Sci-fi

Sizeable
Shared: Casual · Puzzle · Indie

LOCKDOWN Protocol
Shared: Casual · First-Person · Puzzle

The Talos Principle
Shared: Puzzle · First-Person · Sci-fi

Berry Bury Berry
Shared: 3D · First-Person · Casual

FragPunk
Shared: FPS · Free to Play · Futuristic

Zup!
Shared: Casual · Puzzle · Indie

GoreBox
Shared: FPS · 3D · First-Person

Bright Memory: Infinite
Shared: FPS · Indie · First-Person