Games like They Are Coming
Games like They Are Coming include Plants vs. Zombies GOTY Edition, They Are Billions, 7 Days to Die, 20 Minutes Till Dawn, and Skul: The Hero Slayer. We matched them by the tags players give They Are Coming on Steam (Indie, Action Roguelike, Shooter, Shoot 'Em Up, and Tower Defense): closest matches first, and among equally close ones the better-known games.

Plants vs. Zombies GOTY Edition
Shared: Tower Defense · Zombies · Strategy

They Are Billions
Shared: Zombies · Strategy · Tower Defense

7 Days to Die
Shared: Zombies · Survival · Base Building

20 Minutes Till Dawn
Shared: Action Roguelike · Shoot 'Em Up · Survival

Skul: The Hero Slayer
Shared: Indie · Action Roguelike · 2D

SurrounDead
Shared: Zombies · Survival · Shooter

Vampire Survivors
Shared: Action Roguelike · Indie · 2D

The Final Station
Shared: Indie · Survival · Zombies

The Last Stand: Aftermath
Shared: Zombies · Shooter · Action Roguelike

The Binding of Isaac: Rebirth
Shared: Action Roguelike · Indie · 2D

PUBG: BATTLEGROUNDS
Shared: Shooter · Survival · Strategy

Necrosmith
Shared: Action Roguelike · Zombies · Tower Defense

Rise to Ruins
Shared: Tower Defense · Strategy · Indie

DayZ
Shared: Zombies · Survival · Shooter

Left 4 Dead 2
Shared: Zombies · Shooter · Survival

SKYHILL
Shared: Action Roguelike · Indie · Survival

Let Them Come
Shared: Indie · Tower Defense · Shooter

Project Zomboid
Shared: Zombies · Survival · Indie

Death Road to Canada
Shared: Action Roguelike · Zombies · Indie

Oxygen Not Included
Shared: Survival · Base Building · Indie

Megabonk
Shared: Action Roguelike · Indie · Survival

Plague Inc: Evolved
Shared: Indie · Strategy · Zombies

Nuclear Throne
Shared: Action Roguelike · Indie · Shooter

Deadly Days
Shared: Indie · Action Roguelike · Zombies