Top similar games like Planetary Siege:

In The Line TD, you decide your path and you survive! Plan your strategy, carve your own path, choose your difficulty and survive the longest!

Gird your loins and sharpen your steel! Besiege 20 unique enemy lords and battle friends online, in this expanded remaster of the classic 'castle sim'. Relive history with new units, AI opponents, visuals, audio, campaigns, skirmish trails, co-op and larger maps.

Eversiege is a roguelike, tower defense in which you'll defend a castle in procedurally generated terrain. Establish a production, build defending buildings and survive waves of enemies coming from everywhere! After defeat, buy new buildings, unlock new leaders and prepare to fight again.

2D Strategy game.

Grow out your defenses and defend against waves of invasive enemies. Manage resources, explore further out into the wilds, and strengthen your grove. Wild Growth TD combines tower defense with real time strategy and rogue-lite elements.

A classic RTS with automated micromanagement. Workers perform their tasks and your army fights automatically. Free up your hands to focus on building a strategic defense for your base and craft an army and mighty heroes to destroy enemies on endless procedurally generated maps.

Cosmic Stronghold is a mix of the genres RTS and Tower Defense. Your primary goal is to keep your space station alive for as long as possible, so that it can harvest the nearby mines for precious mineral ores. You will be faced with waves of enemies, getting stronger and stronger for each wave.

Delve for materials, machines and curiosities in this game inspired by Dungeon Keeper and Pikmin.

The Final Bastion is a Multiplayer PvP & PvE Tower-defense with a classic Medieval-Fantasy theme. Compete against players in head to head online in a PvP, sending waves against the enemy and growing your economy. Play side by side with your friends in PvE and see who survives the longest.

Build & defend a small remote mining base on Taichin XI from the alien hordes. Deploy defenses, upgrade your turrets and get ready for the nightfall. The Unearthened is a classic Idle Tower Defense game where you build towers and prepare for the invasion.

The highly anticipated sequel to the best-selling Stronghold, Stronghold Crusader HD throws you into historic battles and castle sieges from the Crusades with fiendish AI opponents, new units, 4 historical campaigns and over 100 unique skirmish missions.

Tower-defense mixed with economy elements. It features complex skill trees, resource trading, building your own village, and setting individual tactics for each tower. Can you defend what you've built from hordes of enemies? Visit Ancient Islands and test your tactical sense!

A simple real-time base building game about defending your base against ever intensifying threats from the forest.

Age of Respair is a medieval strategy castle-builder. Build massive castles with fortifications while managing resources and production chains. Assemble a large army and lay siege to enemy castles. Lead your people and bring respair to your kingdom🏰⚔️

The original, uncompleted version of Vectorio. Claim resources, unlock new buildings, and expand your defenses as you fight back against enemy forces in the classic edition of Vectorio! Play for free now.

Sphere Invasion is Sci-Fi Tower Defence. Build your own road and defend it with 7 unique towers.

This is a sci - fi themed tower defense game. Players defend their territory by building defense towers and reclaim areas controlled by enemies. The game adds over 30 different units, all of which can be upgraded to achieve higher performance and firepower through editing entries.

The original castle sim, Stronghold HD allows you to design, build and destroy historical castles. Engage in medieval warfare against the AI in one of two single player campaigns or online with up to 8 players.

Dive into the chaotic world of Nine Nines, the ultimate tower defense experience where every playthrough is a unique challenge! Through 3 campaigns and endless procedurally generated maps, you can grind your way into defeating the strongest enemies!

Use your special ops units to construct base facilities and towers to protect them from the ever-increasing threat of alien invaders in this Tower Defense game with a city-building element! Research their weaknesses and develop defenses before mankind runs out of time.

Warfactory is an innovative blend of factory building, production management, and real-time strategy, putting you in control of a powerful industrial war machine. Design, optimize, and unleash your creativity as you build complex production chains and craft unique robots to dominate the battlefield.

Bunker Defense is a tower defense game for 1-4 players. Waves of enemies attack your base, and you must defend it by building different kinds of defenses.

"Slime Warfare" is a rogue tower defense game with a variety of gameplay and placement.Slimes are weak monsters and always bullied by humans. Players will play the role of the Slime Queen to build structures to defend against adventurers' attacks and strengthen themselves.

Dig gold, chop trees, raise sheep, use these resources to recruit soldiers and build defenses.Wage war with the remaining three kingdoms, or play against friends in a LAN multiplayer game!

Defend your kingdom against legendary monsters. Place turrets strategically to block their path. Upgrade your defenses to fend off enemy hordes. Become the legendary guardian of the earth alone or in co-op!

SpaceMine is a third-person tower defence game where your mission is to defend your mining operation by building towers and barriers to hold off waves of local fauna and collect enough resources to meet the company's quota.

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.

Geometric Paradox TD - a fast paced tower defense with minimalistic graphics but complex mechanics. Build towers, choose the correct upgrades, THINK fast and defeat those nasty shapes! Are you ready to use your strategic and creative thinking to stop the PARADOX?

Greetings sire! Your stronghold awaits you. Build a castle economy, besiege unforgettable villains and return to the 'castle sim' that started it all. Experience this classic RTS with upgraded visuals, modernised gameplay, Steam multiplayer and a new campaign.

Countryball RTS The Real-Time Strategy Game set in 1914. Choose your country, build your base, and manage your economy!

Defend against the ongoing lizard problem in this dynamic tower defense where procedural, level-deforming earthquakes expand the available play area each wave. React to nature's forces and adapt to the changing terrain in order to survive.

A fastpaced, military tug-of-war game with minimal micromanagement. Choose and deploy from a mix of specialized military units to overwhelm the enemy. Experiment with a huge variety of unit compositions, synergies, abilities, and upgrades to lead your army to victory!

OBA DOBA is a Roguelike RTS/Tower Defense that is fast, funny, and frantic. Defend your base with towers and fighters while managing your resources and upgrades. Build up your arsenal of structures, abilities, and passives to defeat the evils that await. Build, rebuild, and survive! (hopefully)

A 2D Strategic Base Defender game set in Medieval times. As relentless Waves of enemy forces threaten your Stronghold, you must gather Resources, Fortify your Defenses and lead your Rebellion. Prepare to strengthen your Base and manage your Resources. But beaware of the Storms!

Voxel Vanguard is a dynamic strategy game set in a vibrant voxel world where players must strategically expand their territory by placing interconnected towers. Navigate through voxel worlds, strategically deploy towers, and connect them with tethers to fend off threats and conquer new territories.