Games like N₂O
Games like N₂O include Warhammer 40,000: Boltgun, ARMORED CORE™ VI FIRES OF RUBICON™, Titanfall® 2, STAR WARS™ Battlefront™ II, and Vanquish. We matched them by the tags players give N₂O on Steam (Retro, Action, Shoot 'Em Up, Shooter, and Arcade): closest matches first, and among equally close ones the better-known games.

Warhammer 40,000: Boltgun
Shared: Retro · Action · Shooter

ARMORED CORE™ VI FIRES OF RUBICON™
Shared: Action · Third Person · 3D

Titanfall® 2
Shared: Shooter · Action · Sci-fi

STAR WARS™ Battlefront™ II
Shared: Shooter · Action · Sci-fi

Vanquish
Shared: Action · Shooter · Sci-fi

Grand Theft Auto V Legacy
Shared: Action · Shooter · Third Person

Planes, Bullets and Vodka
Shared: Action · Retro · Shoot 'Em Up

METAL SLUG 3
Shared: Action · Arcade · Retro

Warhammer 40,000: Space Marine - Anniversary Edition
Shared: Action · Third Person · Sci-fi

ACE COMBAT™ 7: SKIES UNKNOWN
Shared: Shooter · Arcade · 3D

METAL SLUG X
Shared: Action · Arcade · Retro

METAL SLUG
Shared: Action · Arcade · Retro

ARCADE GAME SERIES: GALAGA
Shared: Action · Retro · Shoot 'Em Up

Half-Life 2
Shared: Action · Shooter · Sci-fi

STAR WARS™ Battlefront II (Classic, 2005)
Shared: Action · Shooter · Sci-fi

HELLDIVERS™ 2
Shared: Action · Shooter · Sci-fi

Warhammer 40,000: Space Marine 2
Shared: Action · Third Person · Sci-fi

Ikaruga
Shared: Shoot 'Em Up · Action · Arcade

Battlefield™ 2042
Shared: Shooter · Action · Singleplayer

Dead Space (2008)
Shared: Action · Sci-fi · Third Person

Call of Duty®: Black Ops III
Shared: Action · Shooter · Futuristic

Huntdown
Shared: Action · Shooter · Shoot 'Em Up

Ex-Zodiac
Shared: Shoot 'Em Up · Shooter · Arcade

CULTIC
Shared: Shooter · Action · Retro