Games like Kill Them All
Games like Kill Them All include Escape From Duckov, Warframe, The First Descendant, OUTRIDERS, and Tom Clancy’s The Division™. We matched them by the tags players give Kill Them All on Steam (Looter Shooter, Shoot 'Em Up, Zombies, Top-Down Shooter, and Third-Person Shooter): closest matches first, and among equally close ones the better-known games.

Escape From Duckov
Shared: Looter Shooter · Top-Down Shooter · Shooter

Warframe
Shared: Looter Shooter · Third-Person Shooter · Third Person

The First Descendant
Shared: Looter Shooter · Third-Person Shooter · Shooter

OUTRIDERS
Shared: Looter Shooter · Third-Person Shooter · Shooter

Tom Clancy’s The Division™
Shared: Looter Shooter · Third-Person Shooter · Shooter

Tom Clancy’s The Division® 2
Shared: Looter Shooter · Third-Person Shooter · Shooter

The Last of Us™ Part I
Shared: Zombies · Third-Person Shooter · Shooter

Crab Champions
Shared: Looter Shooter · Arcade · Third-Person Shooter

R.I.P. - Reincarnation Insurance Program
Shared: Looter Shooter · Zombies · Shoot 'Em Up

The Last Stand: Aftermath
Shared: Zombies · Top-Down Shooter · Shooter

The Killing Antidote
Shared: Zombies · Third-Person Shooter · Shooter

Resident Evil 4 (2005)
Shared: Zombies · Third-Person Shooter · Action

Risk of Rain 2
Shared: Third-Person Shooter · Looter Shooter · Shooter

Resident Evil 6
Shared: Zombies · Third-Person Shooter · Action

Resident Evil Requiem
Shared: Zombies · Third-Person Shooter · Action

Yet Another Zombie Survivors
Shared: Zombies · Top-Down Shooter · Arcade

Sky Force Reloaded
Shared: Shoot 'Em Up · Top-Down Shooter · Arcade

Zombieville USA 3D
Shared: Top-Down Shooter · Arcade · Zombies

The Division Resurgence
Shared: Looter Shooter · Third-Person Shooter · Shooter

The Forever Winter
Shared: Looter Shooter · Third-Person Shooter · Shooter

World War Z
Shared: Zombies · Third-Person Shooter · Shooter

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

Resident Evil 5
Shared: Zombies · Third-Person Shooter · Action

Days Gone
Shared: Zombies · Post-apocalyptic · Third Person