Games like Ship Regulus
Games like Ship Regulus include Home Behind 2, Dungeon of the ENDLESS™, The Scroll of Taiwu : Beyond The Dome, EVE Online, and Mount & Blade II: Bannerlord. We matched them by the tags players give Ship Regulus on Steam (Strategy, Adventure, RPG, Simulation, and City Builder): closest matches first, and among equally close ones the better-known games.

Home Behind 2
Shared: Strategy · Adventure · RPG

Dungeon of the ENDLESS™
Shared: Strategy · RPG · Tower Defense

The Scroll of Taiwu : Beyond The Dome
Shared: RPG · Strategy · Adventure

EVE Online
Shared: Adventure · Space Sim · Simulation

Mount & Blade II: Bannerlord
Shared: Strategy · RPG · Simulation

Home Behind
Shared: Adventure · RPG · Strategy

Totally Accurate Battle Simulator
Shared: Simulation · Strategy · Adventure

Between the Stars
Shared: RPG · Strategy · Simulation

Total War: WARHAMMER
Shared: Strategy · RPG · Simulation

For The King II
Shared: Adventure · Strategy · RPG

The Long Journey Home
Shared: Strategy · Simulation · RPG

FTL: Faster Than Light
Shared: Strategy · Roguelike · Simulation

Carrier Command 2
Shared: Strategy · Simulation · Adventure

Ultimate Epic Battle Simulator 2
Shared: Strategy · Simulation · Wargame

The Lost Village
Shared: Strategy · City Builder · Simulation

Lessaria: Fantasy Kingdom Sim
Shared: Strategy · Simulation · City Builder

Sultan's Game
Shared: Strategy · RPG · Adventure

Cities: Skylines
Shared: Simulation · Strategy · City Builder

Mount & Blade: Warband
Shared: RPG · Strategy · Adventure

For The King
Shared: RPG · Strategy · Roguelike

Heroes' Vow: Three Kingdoms
Shared: Strategy · Simulation · RPG

Chrono Ark
Shared: Strategy · RPG · Adventure

Elite Dangerous
Shared: Space Sim · Simulation · Adventure

Renowned Explorers: International Society
Shared: Strategy · Adventure · RPG