Games like Rekindling
Games like Rekindling include RimWorld, Dwarf Fortress, Prison Architect, Oxygen Not Included, and Kingdoms and Castles. We matched them by the tags players give Rekindling on Steam (Indie, Simulation, Strategy, Sandbox, and Base Building): closest matches first, and among equally close ones the better-known games.

RimWorld
Shared: Strategy · Base Building · Sandbox

Dwarf Fortress
Shared: Simulation · Strategy · Base Building

Prison Architect
Shared: Simulation · Sandbox · Base Building

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

Kingdoms and Castles
Shared: Simulation · Strategy · Colony Sim

Infection Free Zone
Shared: Base Building · Strategy · Zombies

Banished
Shared: Strategy · Simulation · Indie

Manor Lords
Shared: Strategy · Simulation · Base Building

Amazing Cultivation Simulator
Shared: Simulation · Sandbox · Strategy

Totally Accurate Battle Simulator
Shared: Simulation · Sandbox · Strategy

Plague Inc: Evolved
Shared: Simulation · Strategy · Indie

Factorio
Shared: Base Building · Sandbox · Strategy

Craft The World
Shared: Sandbox · Crafting · Colony Sim

Gnomoria
Shared: Sandbox · Strategy · Simulation

Project Zomboid
Shared: Zombies · Sandbox · Indie

Empires of the Undergrowth
Shared: Simulation · Strategy · Base Building

Against the Storm
Shared: Simulation · Strategy · Base Building

Kenshi
Shared: Sandbox · Simulation · Crafting

Endzone - A World Apart
Shared: Strategy · Simulation · Indie

Foundation
Shared: Simulation · Strategy · Sandbox

Stonehearth
Shared: Sandbox · Strategy · Simulation

Going Medieval
Shared: Strategy · Base Building · Colony Sim

Songs of Syx
Shared: Strategy · Sandbox · Colony Sim

Workers & Resources: Soviet Republic
Shared: Strategy · Simulation · Base Building