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.

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.

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!

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.

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!

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

Start with a small mining setup and scale into a fully automated asteroid-breaking operation. Invest in permanent upgrades, optimize your build, and push deeper through branching star systems in this active incremental roguelite.

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.

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.

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.

Node Body is a node based incremental action game where your upgrade tree is your body

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.

A survival engineering game where you build life support habitats, mine resources, and automate production chains on a radiation heavy planet. No rescue. No support. Just engineering.

Project: C.E.L.L. is a retro-terminal sci-fi roguelike management sim where you engineer a living cell for a corporation chasing immortality. Run simulations, build organelles, manage resources, and stop cascading failures. How long can you keep the experiment alive?

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.

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

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, progress through layers, collect mods and trade your collected experience for game-changing attachments. When stuck, prestige to unlock abilities and infinite multipliers.

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.

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!

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!

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.

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.

An idle defense game at the bottom of your screen. Build your squad, upgrade your base, and hold the line against relentless alien waves while you work or browse.

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!

Veinrider is a short incremental game about traversing alien caves and escaping a strange planet. Fly, collect and upgrade your gravity-flipping craft to break deeper, faster and stronger!

This is a beautiful "Idle", "Incremental" game based on spirals and mathematics. Your goal is to make the spiral grow farther and farther from the origin. The game is very simple, but it is very deep and can be enjoyed for a long time!

Run a galactic pirate syndicate from a single screen. Raid ships, loot cargo, capture crew, and grow a fleet that raids in parallel while you watch. An incremental space-pirate idle game with tactical raids, a reputation-based black market, and a legendary endgame.