Top similar games like Idle Geometry Defense:

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.

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

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!

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.

BastionOS is a chill active incremental game where you command a military terminal to stack ludicrous weapons and upgrades onto a lone tower facing an endless machine army. Destroy a gigantic evolving horde, get destroyed, unlock new tech, repeat, and get strong enough to survive the next level.

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!

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.

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.

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!

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.

Galactic Simulator is a clicker game based on the Fermi Paradox and the Great Filter theory. Players can simulate the evolution of celestial bodies and civilizations in the galaxy from an observer's perspective. The game supports multiplayer mode. Create a unique galaxy with friends!

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.

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

The Rift Machine is an incremental game about harvesting resources from inter-dimensional anomalies. Research technologies, manage resources and deploy contraptions to gain knowledge, wealth and power.

An idle incremental adventure in space! Mine asteroids while fighting off enemy AI drones. Build your own AI drones, mining lasers, helper drones and more. Collect hundreds of rewards and unlock a variety of features that will help your ultimate goal: making numbers go up (or sometimes down).

Experience cosmic harmony in this Katakamuna-inspired idle game. Gather "Ka," the essence of all existence, and weave the 80 verses of the Katakamuna Utahi. As an idle game, actions automate as you progress, allowing you to create harmony through color and sound, even when offline.

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.

Join in on the next gold rush and become a prospector in space. In this unique tower defense you can set up and reposition towers for maximum efficiency and adapt to the environment.

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

This is a sci-fi strategy game featuring a Defense Mode focused on tower defense and an Attack Mode focused on combat. The game includes over 30 different buildings and units, all of which can be upgraded through entry editing to enhance their performance and firepower.

An idle incremental game where you decide to travel across the whole Universe. Embark on this journey in your little ship and get as far away as possible from Earth, gathering resources and upgrading your spaceship along the way.

Space Colonizers is a simulation and strategy idle game of Sci-Fi adventure theme. To explore more planets and meet cute aliens, you have to constantly install parts and upgrade spacecraft.

Dig deep, manage workers, research tech, and face quantum mysteries in this terminal style incremental mining game.

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!

Clankers! is a short incremental robot killing game. Kill Clankers, gather money and spend it on weapons and upgrades to stop Clankers from stealing our jobs!

Main Sequence is a space-sim factory builder where your goal is to build an interstellar industrial empire. Collect resources, automate production, and expand your fleet of ships in order to survive and leave your mark on the galaxy.

Relax and watch your marbles fill circle after circle. Make strategic improvements then unwind in this retro futurist, idle arcade game.

Cosmic Castaway is a colony building survival game. Gather scarce resources, rescue and assign your crew, build and defend your outpost from hostile forces, and turn wreckage into refuge to repair your ship and escape back to your home planet.

Click your way through Clickoin - a sleek clicker game where every coin press brings unique skins! Earn up to 4 steam drops per hour, unlock stunning visuals, and grow your collection with clever in-game mechanics.

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!

Put your reflexes to the ultimate test with this unique arcade-style racing game: Warp speed: Infinity. Make your way through space at incredible speeds while dodging asteroids and space junk. Unlock a variety of different ships with unique features and handling by reaching ever higher scores.

Help humanity to spread throughout the cosmos by exploring new worlds, building space factories and setting up trade routes. Research advanced technologies to increase efficiency and unlock new paths of development. Fight off other artificial intelligences in your goal to reach the Final Upgrade!

Dodge bullets and upgrade yourself in Minutescape, a retro-inspired incremental game that keeps unfolding. Unlock new abilities and keep upgrading yourself to survive for 5 consecutive minutes.

A sci-fi management game where you build and optimize your computer's system from the ground up. Connect and configure interconnected nodes to efficiently download, process, and upload files. Manage your setup, solve system challenges, and become the ultimate system architect