Top similar games like Idle Geometry Defense:

Guide a robotic mission in Venus’s polar clouds in this space colonisation city builder. Collect energy, mine resources, balance buoyancy to stay afloat, in the treacherous Venusian atmosphere, and build a self-sufficient base while navigating storms and acid clouds to hunt mysterious anomalies.

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.

Starship Factory is a construction / space simulation game where you build, test, and optimize rocket production for Mars colonization.

Hostile Mars is a factory-building game focused on combat! Explore an open world and discover new tech to unlock powerful weapons and structures. Create efficient supply chains using delivery bots. Salvage destroyed enemies for resources. Design your base to withstand increasing waves of enemies!

Welcome to Trappist-1, 40.7 light-years from Earth. Fly your Ark, a colossal spaceship and mobile base. Explore the solar system and establish thriving colonies. Uncover the mysteries of Trappist in this story-driven colony builder.

Guide pioneering settlers among Venusian clouds in this space colonisation city builder. Grow food, collect energy, mine resources, balance buoyancy and weight to stay afloat in the treacherous Venusian atmosphere, and build a self-sufficient colony while navigating storms and acidic clouds.

A retro Win98 styled incremental game about terraforming Mars. Manage power, build your systems, and clear the atmosphere to make the planet livable.

Board your ship and push the boundaries of space exploration in this contemplative space incremental. Gather resources, develop your technology, and travel from the Moon to the edge of the solar system to answer a mysterious signal from the stars.

Harvest energy across the solar system. Build generators on alien worlds, prestige for Dark Energy, and construct a Dyson Sphere around the Sun. Ten planets. Infinite power. One way home.

Shard Cycle is incremental prospecting game. Destroy crystals, collect drill effects, attachment and ability items. Progress through more difficult layers and trade your collected experience for game-changing trading goods.

Module Miner is a minimalist retro inspired idle mining game. Hover over blocks to break them, collect resources, and buy upgrades.

A whispering flame craves souls. With each offering, your resolve strengthens. Fight spirits, collect their essences, and feed a hunger that may never subside in this short active incremental.

Age of Axiom is an atmospheric incremental game that combines satisfying "number-goes-up" progression with an unraveling sci-fi mystery. 

Fight off a galactic threat in this idle clicker game. Battle waves of enemy ships, progress actively or passively, and save humanity. With over 200 high-quality ship models and background mode, watch your fleet soar across your desktop while you work!

Build. Defend. Survive. Expand. A sci-fi base-building game on a hostile alien world. Gather resources, build a sprawling high-tech colony, and defend against relentless alien threats—then unlock new planets, new challenges, and the secrets of humanity’s last frontier.

Construct colossal megastructures in this industrial, retro-futuristic idle game. Manage grid-based modules, explore exotic star systems, and unlock the secrets of reality through exploitation and optimization.

Build your spaceship, Gargantua. Establish industries, shape the free market, trade between planets, and defend your wealth. A single mistake can collapse supply chains and trigger interstellar economic crises. Remember, war is money.

Type2 is a space-based city builder where you try to run a mining business on the moon. Use your management skills to maintain a colony, expand your company, and of course, make money

Awaken as a fledgling machine intelligence. Infiltrate terrestrial networks, architect flawless automated production loops, and evade human containment. From local server siphons to Dyson-scale stellar engineering, guide your ascent across 14 evolutionary phases. The substrate remembers.

A cozy idle game about reviving an abandoned deep-space refinery. Get the scanner running, dig up ore, build the machines that process it, and let your drones run the place while you're away. Two prestige layers, 30 achievements, a 19-track soundtrack, and no microtransactions, ever.

Outpost Surge is a society survival game on Mars, where players balance resource management, city growth, and settler health to turn a barren landscape into a thriving, vibrant city.

There will be challenges to overcome. Execute your strategy and improve your colony’s chances of survival while unlocking the mysteries of this alien world. Are you ready? Mars is waiting for you.

Planetfall: Endless Wave is an idle incremental base-defence game with a classic RTS look. Survive endless waves of alien invaders by upgrading turrets, fortifications, and troops as the battlefield grows more hostile with every wave.

Build & manage your Intergalactic Transfer Hub. Receive travellers and dock ships. Help passengers transfer, but also control them. Expand hub, build shops, take care of everyone's needs. Increase profits, change taxes. But beware: dangerous diseases and asteroids may alter your plans!

Rule the battlefield from orbit! Crystal Nexus: Alien Siege is a hybrid deckbuilding tower-defense game that puts you in charge of outposts on hostile alien planets. Look down on the battlefield from your space station and deploy towers, weapons, and buffs from the cards you’ve collected!

SpaceFlight Factory is an Automation and Base Building game with some survival game mechanics.You lead a small colony of human remnants. Help them to survive, expand and gather enough resources to leave Earth for their new home planet.

HAS Galactics is a top-down factory builder. Design your own rocket, automate your production lines, balance your reputation between the Galactic Factions and complete daring missions. Start from a humble beginning… to a thriving galactic mega-factory!

Factory management and sandbox base building in zero-g environment. Survive, expand and then dominate space industrial market. Build large scale resource processing plant completely from nothing.

You are neither a general nor a soldier — you are a Stellar Industrialist. To you, peace is nothing but shutdowns and losses. Venture to the frontlines, strip battlefields for wreckage and salvage, turn spoils into resources, and expand your interstellar arms empire.

Explore, scan, and conquer an unknown world. Deploy rovers, uncover hidden resources, and build a fully automated colony that must survive, adapt, and scale.

Start as a microscopic speck, become the end of everything. Void Core is a minimalist sci-fi idle game where you control a black hole. Harvest matter, bend spacetime to automate your growth, and consume entire galaxies. Consume. Grow. Evolve.

A short incremental game where you are tasked to clean a lab from fleshy growths using your flamethrower. Collect resources and spend them in a vast upgrade tree to unlock new abilities.

A sci-fi low-poly tower defense game. Design your defense against waves of aliens using a wide arsenal of different towers.

Free demo available! Progress carries over to full game. Build, optimize, and evolve your system in this cyberpunk idle game. Deep customization. Actively being improved based on player feedback.

Build the most efficient intergalactic factory in space simulation strategy game Dyson Sphere Program! Harness the power of stars, collect resources, plan and design production lines and develop your interstellar factory from a small space workshop to a galaxy-wide industrial empire.

Galacticorp is a multiplayer incremental trading and crafting sim. Grow your wealth through co-operation or conquest. Navigate Galacticorp's player-driven economy to climb to the top, unlocking new passive and active gameplay mechanics as your prestige grows.