Top similar games like The Impostor:

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.

Under Domain - Alien Invasion Simulator will surprise you with a Sci-fi turn-based game completely different from others. How about turning yourself into an Alien and planning an invasion to Planet Earth? You can secretly influence human history and build war machines to exterminate human beings.

MIND MAZE - is a logical competitive game based on capturing of the playing field.

In Battlestar Galactica Deadlock™ you’ll take command of the Colonial Fleet in defense of the Twelve Colonies during the First Cylon War. Lead many different types of ships in this 3D tactical game. Every decision counts, your strategy will be vital – can you ensure mankind’s survival?

The black hole is approaching, the singularity is inevitable! It is too late to run now, your only way out is a miracle. Your salvation lies in the power of the Grid - claim it for yourself and use it to escape your dark and terrible fate.

Crystal Cosmos is a side scrolling color-based space shooter. You need to match your ship's color to your enemies color in order to destroy them.

ENDLESS™ Space is a turn-based 4X strategy game, covering the space colonization age in the Endless universe, where you can control every aspect of your civilization as you strive for galactic domination.

Braveland is a turn-based game inspired by old-school strategies with hexagonal battlefield. You will start as a humble warrior's son whose village was cruelly raided and will end as talented commander of your army.

Test your reflexes and keep your mind sharp with this challenging and fun cyberpunk themed game about cracking safes... in space! Train to become better and better, and place higher on the leaderboards. Are you the fastest amongst your friends, on Steam, in the whole world? Prove it.

This sci-fi adventure brings you to command stations in the far corners of space. Casually make decisions and watch how well you can balance the needs of your station.

Bend the rules of time to your whim to outsmart and out-think your opponents. Fun 4-player co-op strategy card-game which will leave you on the edge of your seat!

Wordies is bringing a word game you've most likely played & enjoyed to Steam. But it's harder than before, with only 5 guesses you're given the not so easy task of guessing a common American word! Guess the daily word & build up highstreaks to compete against the world in our global leaderboards!

Galactic Empire is a 2D turn-based strategy game where you, as the Commander, decide the fate of the entire universe. Expand your planet, explore solar systems, play cards in cantinas, modify your ships and conquer more planets.

A graphical multi-player play by turn war game that simulates combat in space between galactic empires.

The future is bleak, its Universe hostile, and not your friend. Mercilessly Tactical, Turn-Based Base-Building Strategy. Pick one of four Factions and develop a battleplan against or with players around the Globe, in a fight against a relentless rogue AI. There is not much Time.

CrashMetal - Cyberpunk The Hokuta City streets await your engine rev. Can you beat everyone in this race for first place? Upgrade your car, take care of its appearance and defeat everyone on the streets of the Hokuta City.

Use your skills and strategies to challenge your friends in local matches or online (via Steam Play Together), in this nostalgic game that brings the whole experience of button Soccer to your PC. There are 8 different teams, and different training scenarios.

Sid Meier’s Civilization: Beyond Earth is a new science-fiction-themed entry into the award winning Civilization series. As part of an expedition sent to find a home beyond Earth, lead your people into a new frontier, explore and colonize an alien planet and create a new civilization in space.

Sequence is a dice-based poker game, multiplayer & competitive, inspired by the classics Generala/Yahtzee/Yacht/Yatzy (every area of the world has a name for the game!). Now, players from all over the world can compete to climb the ranks - will you become a Senior Master?

Infinity Wings - Scout & Grunt Take control of your chosen fighter (either Scout or Grunt) in this side scrolling shooter.

The Pegasus Expedition is a story-driven sci-fi grand strategy game set in a key moment for humankind’s survival. Facing an overwhelming threat at home, humanity sends expeditions to the Pegasus Galaxy in a desperate attempt to find a refuge for the population of Earth.

Space Tournament is the ultimate destination for experiencing captivating drifts in a stunning 2D space environment.

Defend your AI capital against endless alien invasions in this space shmup-inspired tower defense with roguelite randomness. Dissect bodies and ships to unlock weirdly powerful tech. Upgrade your base with turrets, turning your screen into a symphony of perfect destruction!

You have crash-landed on a strange alien planet as a cicada, surrounded by a world teeming with giant insects and thriving fungi, waiting for you to explore!

Streak of Power is a turn-based strategy game. Humanity needs large amounts of energy. The energy beam of other companies, which should actually be directed to Earth, is used as a weapon against others. You are a company owner and must fight for your survival.

The ultimate space capital ship combat compendium is the evolution of hard core space combat sims. The only game of its kind currently in existence.

Are you ready to build your dream music studio? Music Producer Tycoon puts you at the heart of the music production world in an immersive simulation experience!

HARD VOID is a 4X turn-based space strategy game in a lovecraftian universe. Lead your species across galaxies and multiple dimensions to build an Empire. Design your spaceships, assemble your fleets and fight for supremacy. But beware, unthinkable Eldritch horrors lurk in the vast darkness.

GunboundM is the latest version of the world famous turn-shooter, Gunbound. Gamers from all over the world on Steam and mobile platforms can compete or collaborate together. Enjoy over 40 tanks and over 100 avatars with unique weapons and skills.

BUMP! Superbrawl is a fast-paced 1v1 turn-based strategy game where anticipation and clever planning are your ultimate weapons. Battle in the vibrant utopia of Arcadia, filled with myths and legends from around the world, and outsmart your opponent to claim victory!

《Crazy Ludo》 is a strategy casual game. By continuously attacking opponents to gain points to obtain the final victory of the game, cool cartoon aircraft image, classic turn-based mode, brand-new flying chess combat gameplay, let us experience the fierce battle of aircraft together！

Chyss is a turnbased, tactical 1vs1 game inspired from chess. You can move, attack, and consume your mana to summon new units, cast spells and use items when it's your turn. Your characters both have a move type and range and an attack type and range. Overcome your opponent's team!