Games like Necrosis
Games like Necrosis include Squad, PUBG: BATTLEGROUNDS, Left 4 Dead 2, Battlefield™ 2042, and Counter-Strike: Source. We matched them by the tags players give Necrosis on Steam (Bullet Hell, FPS, PvE, Shooter, and Arcade): closest matches first, and among equally close ones the better-known games.

Squad
Shared: FPS · PvP · PvE

PUBG: BATTLEGROUNDS
Shared: FPS · Shooter · PvP

Left 4 Dead 2
Shared: FPS · Shooter · Action

Battlefield™ 2042
Shared: FPS · Shooter · PvP

Counter-Strike: Source
Shared: FPS · Shooter · PvP

Apex Legends™
Shared: FPS · Shooter · PvP

Call of Duty®
Shared: FPS · Shooter · First-Person

Paladins®
Shared: FPS · Shooter · PvP

THE FINALS
Shared: FPS · Shooter · PvP

Delta Force
Shared: FPS · Shooter · PvP

Counter-Strike
Shared: FPS · Shooter · Action

Titanfall® 2
Shared: FPS · Shooter · PvP

BattleBit Remastered
Shared: FPS · Shooter · PvP

Enlisted
Shared: FPS · Shooter · PvP

PAYDAY 2
Shared: FPS · Action · Shooter

Shotgun Farmers
Shared: FPS · Shooter · Action

Battlefield™ V
Shared: FPS · Shooter · PvP

Marathon
Shared: FPS · PvP · Shooter

Insurgency
Shared: FPS · Shooter · Action

Battlefield 4™
Shared: FPS · Shooter · PvP

Call of Duty®: Modern Warfare® 2 (2009)
Shared: FPS · Shooter · Action

Starship Troopers: Extermination
Shared: FPS · Action · First-Person

FragPunk
Shared: FPS · Shooter · PvP

Battlefield™ 1
Shared: FPS · Shooter · PvP