Top similar games like Mars or Die!:
Mars or Die! $19.99
Control two characters simultaneously! Survive, gather, collect upgrades, fight all sizes of one-eyed Martians, build defensible outposts and conquer Mars, in this glorious mix between roguelite and tower defense.
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Asteroid Core$0.99
You are isolated on a small meteor and need to build a fire to escape before being destroyed by aliens. Use your limited space to create machines and obtain more and more resources. Enjoy this mix of puzzles, tower defense and incremental gameplay.

United Penguin Kingdom$14.99
A city-building game where you build a penguin settlement and satisfy the various needs of your penguins while dealing with seals and killer whales. Enjoy the growth of your settlement, become the king, and lead the United Penguin Kingdom.

United Penguin Kingdom: Huddle upFREE
This free version of the United Penguin Kingdom covers the content from one year of in-game time. A city-building game where you build a penguin settlement and satisfy the various needs of your penguins while dealing with seals and killer whales.

Ascend Factory$6.99
Welcome to Ascend Factory, a factory simulation game that challenges your ingenuity and resource management skills. Immerse yourself in a world of automation and strategic planning as you progress through levels of increasing complexity!

SkyBrew: Entropic Strategist$17.99
Experience entrepreneurship in a floating cloud cafe. Manage your flying cafe, customize construction, train staff, handle random events, and uncover the secrets of the commercial empire, growing from a small shop to the sky's brightest star.

Bestion$1.99
Bestion is a game that combines Roguelike tower defense elements with automated factory construction. Players are required to construct their own factory on a planet and protect the kernel from monster attacks.

Microtopia: PrologueFREE
Become the hive mind of a robot ant colony in this free version of Microtopia! Use pheromone trails to create, automate and optimize supply chains for your ants to follow. Collect resources, produce goods, feed your queen, grow your colony and fly out to expand the species!

Escape Gaia$9.99
you will play as Gaia, the shattered will of a planet, and command your spaceship to explore new worlds, collect and refine various resources, build a home on the damaged spacecraft, summon a wide range of monsters, and ultimately, devour other shattered wills to repair yourself.

AICE$5.99
AICE is a game about designing increasingly complicated processor chips, all while hiding sneaky extra capacity from the 'supervising' humans. Carefully design and layout your chips so that all the extras you've added are well hidden in amongst the regular components!

Foundation$34.99
Foundation is a grid-less, laidback medieval city-building game with a focus on organic development, monument construction and resource management.

nStations$4.99
Construct and manage your colony anytime, anywhere, any device!!!!

Farlanders$14.99
Terraform, strategize, and construct a Martian colony in this retro-inspired turn-based city builder. Create a comfortable living for your citizens, research alien artifacts, and uncover the secrets of the Red Planet.

星旅:前奏 Wandering Planet: Prelude$3.99
Star Trek: Prelude is a space-based game that builds defense towers on earth to defend against alien invaders called Black Ember.

The Riftbreaker$29.99
The Riftbreaker™ is a base-building, survival game with Action-RPG elements. You are an elite scientist/commando inside an advanced Mecha-Suit capable of dimensional rift travel. Hack & slash countless enemies. Build up your base, collect samples and research new inventions to survive.

Triton Survival$14.99
Triton Survival is an open world survival game about exploration, construction, engineering, and fighting on planets. Embark on this interstellar adventure and conquer the galaxy. Are you ready?

Cartonfall: Fortress - Defend Cardboard Castle$4.99
Build your own cardboard fort and defend it against swarms of enemies. Gather resources, craft weapons and set traps. Be creative, improvise and experiment to win.

Terminal squad: Swarmites$3.99
Terminal squad: swarmites is a game with indirect control where you must erect a chain of buildings, which generate resources for construction or the combat units for destruction of an enemy.

AsteroidTD$4.99
Try to survive in infinite asteroid cloud as long as possible in reworked tower defence style. FInd your own playstyle and beat your own records or chillout with original ambient soundtracks. Build, explore, think - everything to create your own colony in this cold space.

Extinction Eclipse$9.99
You are in command of the human fleet, searching for asteroids to mine, extract resources and build bases and more ships to defeat aliens invaders. This simple and short action RTS has a full and exciting campaign, and a skirmish mode that allows you to play a different mission on every match.

Loot Express Delivery Service$9.99
Embark on an adventure with Loot Express Delivery Service, a 2D pixel art game. As the commander, your goal is to retrieve valuable items from a distant planet. Utilize your skills and strategy to complete missions and guide your company to prosperity.

IDUN - Frontline Survival$14.99
A defense RTS where you can move turrets at will. Extract resources, upgrade technology, and defend against enemy swarms in a gripping space campaign. Hold the line, set up your turrets, and brace for screen-filling hordes!

Astronaut Assault$9.99
Dive into Astronaut Assault, a third-person Sci-Fi tower defense game, and battle against relentless enemy waves in diverse arena settings. Arm yourself with an array of turrets, traps, and gadgets to halt, hinder, and outmaneuver your foes.

Astrometica: PrologueFREE
Astrometica: Prologue is the free game about surviving in space. You need to use your skills and tools to stay alive. There are many challenges to face, and you need to fight to survive. You also need to build a new base in space.

Universal Combat CE$9.99
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.

CyberHive$7.99
CyberHive is a strategic space travel simulator with a non-linear story, in the cosmic opera setting, and in an anime visual style.

Satellite Command$9.99
Satellite Command is a realistic, relaxing astrophysics simulator. Complete contracts with real data, launch and take control of ever more powerful Satellites, research advanced technology and build your Space Agency!

Kerbal Space Program$39.99
In Kerbal Space Program, take charge of the space program for the alien race known as the Kerbals. You have access to an array of parts to assemble fully-functional spacecraft that flies (or doesn’t) based on realistic aerodynamic and orbital physics.

Moon Tycoon$9.99
This is the original Moon Tycoon city-building game back from 2001! Remember building vast lunar colonies, then destroying them with meteors and asteroids? Blast off again with the first 3D Sim game, back to the old days on the dark side of the moon. Feeling nostalgic?

Invader TD$2.99
Invader TD is a side scroller tower defense, where the player is in the role of an alien race with the purpose of infecting and dominating the earth, you must protect yourself from the attacks of the humans, who are trying to destroy you.

Planet SFREE
Planet S is a real-time strategy game where your goal is to colonize multiple planets in a solar system to advance your civilization, build a city and supply it to grow your faction.

Atmocity$11.99
Atmocity allows you to build impressive, gravity-defying cities. Test your skills as a mayor in the campaign mode with set objectives, or let your creativity go wild in the free-roaming mode.

Disco Simulator$14.99
Disco Simulator is a tycoon type game based on club management. Your task will be to set up the club from scratch, put up walls, arrange furniture, hire staff, plan events, invite artists, put on concerts. Create your own club!

Metal Mars$11.99
Metal Mars is a real time strategy game where you race to gather resources and build on mars! This game can be played locally with a shared screen with up to three friends (4 players total). There are also 30 challenges to complete against the CPU!

StarMade$14.99
The ultimate space sandbox. Participate in epic fleet battles, form alliances, strive to dominate entire galaxies and harness the universe’s resources for your industrious empire or the destruction of others. Customise your experience, the universe is yours!

3030 Deathwar Redux - A Space Odyssey$14.99
3030 Deathwar is a unique mix of Adventure and Space Sim. Explore star systems, mine and hunt pirates in top-down mode. Leave your ship and switch into classic Adventuring mode, where you explore derelicts, talk to shady characters or head over to the space bar for a drink.

Super Inefficient Golf$4.99
Super Inefficient Golf builds on top of the most inefficient game ever conceived by making it even LESS efficient. Drop your silly golf stick and start using exploding mines to guide your ball! Place them, choose the right timing, and BOOM - Birdie!

BossConstructor$14.99
Scavenge modules, combine them in the deadliest and most efficient ways imaginable, and fly your very own spaceship through alien space with BossConstructor. Thousands of procedurally generated galaxies await you and your space-faring collection of assembled modules to explore them.

SimAirport$24.99
Build & Manage Your Airport. An International Hub or a Regional Masterpiece -- it's up to you. Buy more land to scale out, or escalators to scale up with MULTIPLE FLOORS. You're in full control in this modern business management tycoon!

Citystate$14.99
Create a 21st century micro-nation and experiment with economic and political ideals. Futuristic skyscrapers or spreading slums, the Nation relies on your economic and city planning skills.

ExocraftFREE
Design unique spaceships and build the ultimate space mining fleet as you team up to battle for resources and glory in this massively multiplayer action strategy set in an alien wasteland.

Subdivision Infinity DX$14.99
Subdivision Infinity is an immersive and pulse pounding sci-fi space shooter featuring stunning graphics and tight spaceship game play. Hunt down and destroy enemy spacecraft, crush capital ships, mine asteroids for rare minerals, and find blueprints to craft amazing new vessels!

Holy Potatoes! We’re in Space?!$9.99
Holy Potatoes! We’re in Space?! is a whacky space exploration game where you manage your very own spaceship, craft hundreds of weapons, and explore the vastness of a veggie-filled universe.

Exo TD$19.99
Exo TD is a true 3D space Tower Defense. Invaders have scouted your planet as their next target, you must protect it by building destructive turrets, orbital defenses, shields, drones and more to defend against the incoming invasion force.

Hyperspace Delivery Service$9.99
You’ve been hired to make a delivery to planet Miridian V. The trip will be a dangerous yet lucrative journey full of mad robots and unpredictable stellar phenomenon. Name your crew, name your ship, manage your supplies, trade, battle, survive, and make your delivery!

Portals World$9.99
A sci-fi action strategy tower defense digging 2D top down game, Dig, explore, build production and defensive facilities, take care of robot's battery and manage power wisely..

Gratuitous Space Battles$14.99
Who needs backstory? Who needs resource-gathering? Diplomacy is so last year. Gratuitous Space Battles cuts right to the chase of sci-fi strategy games, and deals with large, completely unjustified space battles between huge opposing space fleets.

Sanctum 2$14.99
Sanctum 2 is the sequel to the world’s first Tower Defense/FPS hybrid game. Pick from four unique character classes and embark on a mission to protect the oxygen-producing Cores from hordes of deadly aliens who are threatened by their existence.

Space Pirates And Zombies 2$19.99
Design and then improve the ultimate mothership. Explore a persistent living galaxy populated by 200 unique captains that can do everything you can do. Survive the zombie infection and then fight them back. Make allies and start your own faction. Build your empire. Also includes Sandbox Mode.

Star Horizon$9.99
Experience fast action, thrilling levels, spectacular explosions and lots of pew-pew-pew. Star Horizon is a reboot for the on-rails space shooter genre.

Void$0.99
Feel the inhuman tension of outer space - floating between bits of debris - struggling to conserve air and fuel - experiencing a hauntingly personal tragedy.

Force of Nature$7.99
Force of Nature is a Sandbox game that combines Action, Adventure, RPG, Strategy and Management genres