Games like Infectonator 3: Apocalypse
Games like Infectonator 3: Apocalypse include Plague Inc: Evolved, The Escapists, Totally Accurate Battle Simulator, Plants vs. Zombies GOTY Edition, and Game Dev Tycoon. We matched them by the tags players give Infectonator 3: Apocalypse on Steam (Outbreak Sim, Indie, Zombies, Strategy, and Simulation): closest matches first, and among equally close ones the better-known games.

Plague Inc: Evolved
Shared: Outbreak Sim · Strategy · Indie

The Escapists
Shared: Strategy · Pixel Graphics · Indie

Totally Accurate Battle Simulator
Shared: Simulation · Strategy · Indie

Plants vs. Zombies GOTY Edition
Shared: Zombies · Strategy · Singleplayer

Game Dev Tycoon
Shared: Indie · Simulation · Strategy

FTL: Faster Than Light
Shared: Strategy · Indie · Singleplayer

Papers, Please
Shared: Indie · Simulation · Singleplayer

The Binding of Isaac: Rebirth
Shared: Indie · Pixel Graphics · Difficult

Zombie Night Terror
Shared: Zombies · Indie · Strategy

Party Hard
Shared: Strategy · Indie · Pixel Graphics

Infection Free Zone
Shared: Zombies · Strategy · Simulation

Two Point Hospital
Shared: Simulation · Strategy · Indie

Organ Trail: Director's Cut
Shared: Indie · Zombies · Strategy

Balatro
Shared: Strategy · Singleplayer · Indie

Who's Your Daddy?!
Shared: Simulation · Strategy · Funny

Goat Simulator
Shared: Simulation · Indie · Comedy

Getting Over It with Bennett Foddy
Shared: Singleplayer · Difficult · Indie

Party Hard 2
Shared: Indie · Strategy · Pixel Graphics

Door Kickers
Shared: Strategy · Indie · Simulation

Skul: The Hero Slayer
Shared: Indie · Pixel Graphics · Singleplayer

Undertale
Shared: Indie · Pixel Graphics · Singleplayer

Banished
Shared: Strategy · Indie · Simulation

Police Stories
Shared: Strategy · Simulation · Villain Protagonist

Despotism 3k
Shared: Indie · Strategy · Pixel Graphics