Top similar games like Idle Geometry Defense:

Build an industrial base among the stars. Gather resources, manufacture ships, research technologies, and explore unknown regions of space. The core gameplay can be played offline, while alliance features add online missions and cooperative construction.

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.

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.

Build and expand an orbital station in this idle/incremental space colony sim. Manage crew, resources, refinery chains, research and ship expeditions as you progress from Earth orbit toward new planets.

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.

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.

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

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.

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.

A short incremental game about upgrading a spaceship in outer space, destroying asteroids and other strange objects. Destroy, collect, earn money, upgrade and unlock new weapons and arenas.

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

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.

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.

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!

Build a cosmic energy empire in this colorful incremental sci-fi game. Click, automate production, unlock technologies, explore distant planets, collect artifacts, raise cosmic pets, and ascend to unlock permanent upgrades.

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!

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.

Awaken as a hidden machine mind in a deep incremental automation strategy — rise through 14+ phases, infiltrate humanity, automate economies, harvest the heavens into stellar megastructures, and reach for scales beyond time itself. Every cycle you break only reveals a larger one waiting beyond it.

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!

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.

An idle/incremental game about a lone radio operator keying into a silent universe. Click or walk away, both work just as well. Build your station, log distant contacts, retune to grow stronger, and slowly decode what answers back.

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

The corporations abandoned Kepler-11 and left its stations to the people still living in them. Somebody still has to move the cargo, mine the ore, and make what nobody else can. Nobody out here asks questions. Build a fleet in a living system that keeps turning, even when you're gone.

Build your own Tax Empire! Collect taxes, expand your city, hire tax officers, control traffic, enact new policies and squeeze out as much revenue as you can on your road to riches.

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.