Games like Solar Kingdoms: Human Survival
Games like Solar Kingdoms: Human Survival include ZeroSpace, Stronghold Crusader: Definitive Edition, Stronghold: Definitive Edition, Stronghold Crusader HD (2012), and Company of Heroes 3. We matched them by the tags players give Solar Kingdoms: Human Survival on Steam (Exploration, Turn-Based Tactics, Action RTS, Real Time Tactics, and City Builder): closest matches first, and among equally close ones the better-known games.

ZeroSpace
Shared: Action RTS · Real Time Tactics · City Builder

Stronghold Crusader: Definitive Edition
Shared: Real Time Tactics · City Builder · Colony Sim

Stronghold: Definitive Edition
Shared: City Builder · Real Time Tactics · Colony Sim

Stronghold Crusader HD (2012)
Shared: Real Time Tactics · City Builder · Colony Sim

Company of Heroes 3
Shared: Action RTS · RTS · Real Time Tactics

Stronghold HD (2012)
Shared: Real Time Tactics · City Builder · Colony Sim

IXION
Shared: City Builder · Colony Sim · Exploration

Kingdom Eighties
Shared: Exploration · Action RTS · City Builder

Space Haven
Shared: Colony Sim · City Builder · Base Building

Stronghold: Warlords
Shared: Real Time Tactics · City Builder · Colony Sim

Cossacks 3
Shared: RTS · Action RTS · Strategy

Stronghold 2: Steam Edition
Shared: Real Time Tactics · City Builder · Colony Sim

Kingdoms and Castles
Shared: City Builder · Colony Sim · Simulation

EVE Online
Shared: Exploration · Space Sim · PvE

Manor Lords
Shared: City Builder · Strategy · Base Building

Anno 117: Pax Romana
Shared: City Builder · Exploration · RTS

They Are Billions
Shared: Colony Sim · City Builder · RTS

ERA ONE
Shared: Exploration · Action RTS · RTS

Planetary Annihilation: TITANS
Shared: Real Time Tactics · RTS · Base Building

Anno 1800
Shared: City Builder · Exploration · RTS

Going Medieval
Shared: Colony Sim · City Builder · Base Building

Dungeons 4
Shared: City Builder · Real Time Tactics · RTS

The Wandering Village
Shared: City Builder · Exploration · Colony Sim

Frostpunk
Shared: City Builder · Colony Sim · Strategy