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.

Face off as Human or Alien in an asymmetric online 1v1 game within a remote lunar facility. Purify, repair and predict or infest, sabotage and elude in a strategic battle for control.

Lead artificial lifeforms with limited lifespans and colonize six hostile worlds in a desperate sci-fi survival experiment.

A two-player turn-based strategy game where you place planets on orbits, rotate and move your galaxy, and win by making one of your planets collide with the opponent's star.

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?

Win or lose in 5 minutes. No base building. No downtime. Only conquest. Galaxy Conquest Online is a fast-paced sci-fi RTS where you capture planets, expand your fleet and crush your enemies in relentless singleplayer and multiplayer battles.

A multiplayer card game in first-person with hidden roles, bluffing, and shootouts. Set in a gritty bar, players must read the room, play their cards wisely, and pull the trigger to survive the table.

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.

The 2048 roguelike deckbuilder. Stack game-warping mods and tile enhancements on a systemic board, chain merges, and compete online for the highest score.

RootKit is a tactical hacking game set inside a corporate honeypot network. Track hostile hackers, infiltrate their systems, steal crypto and data, and eliminate them before they trace your connection.

A space trading roguelite. Buy low, sell high, dodge pirates, bribe customs — and pay off your debt to The Syndicate before time runs out.

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.

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!

Hack the system. Generate data. Break reality. Hackflesh is a cyberpunk clicker with 20 generators, 716 upgrades, a constellation prestige system and over 600 achievements. Click, automate, hack, repeat.

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

Witchcrafter The TCG is a trading card game inspired by global shamanic and spirit folklore, featuring both PvP and single-player modes. Collect, build, and enhance your deck from over 2,000 unique cards while exploring a world rich in lore and culture.

Build your own galactic empire and lead it to dominance across the cosmos. Develop technology, manage your fleet, colonize planets, and engage in turn-based battles. Every decision shapes your path to victory in a dynamic sci-fi strategy game.

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.

Streak of Power is a turn-based strategy game of precise laser duels. Aim your laser strategically, use gravitational satellites that alter its path, and seize control of them. Outsmart your opponent and destroy their base before you’re hit.

A turn-based game inspired by classic board games – featuring 8 unlockable maps, items, special tiles, a campaign, free play mode, and a name editor for your characters. Supports up to 4 players or AI in local multiplayer. Colorful, fun, and family-friendly.

Four-dimensional chess, rendered in three-dimensional space. Move pieces across a board eight layers deep, shift their phase between Small, Regular, and Large along a hidden fourth axis, and capture only when position and state align. Play solo, locally, or online.

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.

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

A turn-based tactical strategy game set in a sci-fi war between Humans and Aliens. Command units on a triangular grid battlefield, control strategic zones, and outmaneuver your opponent in PvE or PvP combat.

High-stakes starship combat on a hex grid. Outmaneuver your enemies, unleash devastating firepower, or swarm their capital ships with fighter squadrons. Every decision counts.

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?