Games like Master of Orion 1 on Steam
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Particle Fleet: Emergence
Build and design your own fleets and stand opposed to the Particulate in this physics/strategy/RTS/fleet hybrid. Build partially destructible and self repairing ships that interact with enemies less controlled by some scripted logic and more driven by a real time massive physics particle simulation.
Space Hulk: Tactics
Space Hulk: Tactics is a faithful adaptation of the board game Space Hulk, set in the Warhammer 40,000 universe, bringing a unique twist to the cult classic formula. Engage in bloody battles as either a squad of Terminator Space Marines or the deadly alien Genestealers.
Battlevoid: Harbinger
Battlevoid: Harbinger is a hard sci-fi space exploration game blending roguelike, turn-based, star map strategy, and real-time space battles. You are a young commander venturing out into enemy territories, to unknown galaxies, never knowing what you will face as you jump out from hyperspace.
Space Rogue
Take on the role of a spaceship captain. Explore new worlds, and engage in intense ship-to-ship battles. Develop unique battle tactics, upgrade your ship, and recruit crew members as you fight for peace or piracy.
Pike and Shot : Campaigns
The ultimate wargame set in the age of Pike and Shot is back. You are now in full charge of your nation’s armies, throughout a long campaign in the struggle for dominance.
Jagged Alliance 2 - Wildfire
Even if the regime is totally inept and corrupt, don't suppose for a moment that you as the liberator will be greeted with open arms.JAGGED ALLIANCE 2: WILDFIRE brings you back to Arulco. The population is being terrorized by a reckless army; in the meantime the main export goods are drugs.
Ascension
In this cultivation 4X strategy game, your sect has been in peril, and so they open a portal—sending you, a young disciple and their last hope, inside. Stand tall as the new sect leader and guide disciples to rebuild what was lost. Sharpen your focus, master alchemy, and ascend to immortality.
Aeon Command
Aeon Command is a tug of war strategy game, where you play as one of three unique factions to help gain dominance over the Aeon Nebula! Take control of your mother ship to gather resources, produce ships and fight off the enemy mother ship. Grow stronger as you progress through the 24 mission campaign and unlock new upgrades.
Space Run Galaxy
Space Run Galaxy is the sequel to Space Run, the game from one-man studio Passtech, which seduced hundreds of thousands of players with its dynamic and original gameplay. By twisting the tower-defense game style, Space Run offered an addictive real-time spaceship construction strategy experience.
Age of Wonders 4
Rule a fantasy realm of your own design! Explore new magical realms in Age of Wonders’ signature blend of 4X strategy and turn-based tactical combat. Control a faction that grows and changes as you expand your empire with each turn!
Conquest of Elysium 5
Conquest of Elysium 5 is a quick turn based fantasy strategy game with a touch of rogue-like. The game is full of depth, details and monsters. There are also a huge number of factions, each with its own unique gameplay and magic rituals.
I am not a Monster: First Contact
Retro sci-fi tactical turn-based strategy with an exciting storyline. The Albatross space liner is overrun by lizard-like monsters that can infect humans and turn them into their own kind. Save the passengers and defeat the hostile creatures.
Ara: History Untold
Build a nation starting at any point in human history and compete for supremacy in this epic turn-based strategy game. Engage in diplomacy, fight wars, and go head-to-head with other leaders from history.
Master of Magic
Take up the role of a great wizard, wield powerful spells, command fantasy races and challenge your rivals in this remake of a cult turn-based strategy classic. Do you have what it takes to become Master of Magic?
Heroes of Might & Magic V
Witness the amazing evolution of the genre-defining strategy game as it becomes a next-generation phenomenon, melding classic deep fantasy with next-generation visuals and gameplay. In the renowned Might & Magic universe, demon swarms spread chaos over the land in a relentless assault.
Galactic Civilizations III
Build a civilization that will stand the test of time in the largest space-based strategy game ever! Choose from dozens of unique races and make a name for yourself across the galaxy through diplomacy, espionage, technological advances, and more.
Weird Worlds: Return to Infinite Space
Weird Worlds: Return to Infinite Space is a hybrid roguelike game of space exploration, adventure and starship combat.
Nimbatus - The Space Drone Constructor
Command the Nimbatus and craft drones out of hundreds of different parts. Survive unknown threats in a fully destructible, procedural universe, compete against other players in different arenas or enjoy complete creative freedom in the sandbox.
Jupiter Hell
True Roguelike. Turn-based shooter. Permadeath. Tribute to the sci-fi classics of the Golden VHS era. Successor to DRL. Just you and your gun against hordes of horrors and monstrosities. Give them hell to the rhythm of heavy metal.
X3: Terran Conflict
It is the year 2938. The long wished-for encounter of the X Universe and the Earth holds both joy and sorrow for the people. Despite flourishing trade, the clash of the diverse races, cultures and life forms creates new tensions, mistrust and open conflict that need to be overcome!
Space Crew: Legendary Edition
Time for your toughest mission yet! Recruit and train your crew to tackle the growing threat from alien and android armies as you defend Earth to become a Galactic Legend in Space Crew: Legendary Edition. All new content free to existing owners of Space Crew!