Games like Infection Free Zone
Games like Infection Free Zone include Frostpunk, They Are Billions, RimWorld, Endzone - A World Apart, and Manor Lords. We matched them by the tags players give Infection Free Zone on Steam (Base Building, Post-apocalyptic, Zombies, City Builder, and Strategy): closest matches first, and among equally close ones the better-known games.

Frostpunk
Shared: City Builder · Post-apocalyptic · Strategy

They Are Billions
Shared: Base Building · Zombies · Strategy

RimWorld
Shared: Base Building · Strategy · Survival

Endzone - A World Apart
Shared: City Builder · Post-apocalyptic · Base Building

Manor Lords
Shared: Base Building · City Builder · Strategy

Frostpunk 2
Shared: City Builder · Post-apocalyptic · Strategy

Going Medieval
Shared: Base Building · Strategy · City Builder

Oxygen Not Included
Shared: Base Building · Survival · Colony Sim

Kingdoms and Castles
Shared: City Builder · Management · Base Building

Dwarf Fortress
Shared: Base Building · Strategy · City Builder

Against the Storm
Shared: Base Building · Strategy · City Builder

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

Prison Architect
Shared: Base Building · Simulation · Strategy

Banished
Shared: City Builder · Strategy · Survival

Workers & Resources: Soviet Republic
Shared: Base Building · City Builder · Strategy

Empires of the Undergrowth
Shared: Base Building · Strategy · City Builder

Kenshi
Shared: Post-apocalyptic · Survival · Base Building

Space Haven
Shared: Base Building · Strategy · Survival

Timberborn
Shared: City Builder · Base Building · Colony Sim

Ostriv
Shared: City Builder · Strategy · Base Building

The Wandering Village
Shared: City Builder · Post-apocalyptic · Management

This War of Mine
Shared: Survival · Base Building · Strategy

Surviving the Aftermath
Shared: Post-apocalyptic · Strategy · City Builder

Foundation
Shared: City Builder · Strategy · Simulation