Top similar games like Robo Siege TD:

TAVU is a PvE RTS game with a tactical combat system. Build your bases and defend them against waves of enemy attacks. Upgrade your units and destroy enemy bases to gain new territories and resources.

Classic Tower Defense meets space exploration. Build turrets on mining platforms, harvest enemies to build more defenses, and mine Dark Energy to travel the stars. As a sentient AI, you must upgrade your tech, scan planets, and find a new home for humanity before Earth fades away.

Sci-fi tower defense meets ARPG-like hero combat. Build towers then fight alongside them with your hero as you battle through a campaign to uncover the fate of a colonization effort on a distant planet.

Hexfall is a planet-scale tower defense game where over 100,000 enemies attack at once. Mine the crust, wire the power and arm a hex world against an armada that fills the sky long before it comes down.

Build towers, unleash ultimates and command six heroes in sci-fi tower defense. Play all 100 Scenario stages free. Try one-minute highlights of Basic and GRID COMMAND before purchase, then take your aerial fleet into GRID COMMAND's survival battles.

Build towers, shape enemy paths, and defend your outpost from endless waves. Survive escalating threats, destroy falling asteroid hazards, and push your defenses to their limits in Endless Mode.

On a forgotten world, confront a malevolent machine intelligence. Extract minerals, build factories, power up the railguns, and arm the missile batteries. Defend the Fortress Omega against the alloyed nightmare.

Tower Defense with resource- and base management! Waves of enemy robots with special abilities, shield and armor! Mining, refining and production for building and repairing! Environmental hazards and the best: the Orbital strike!

Build your towers, plan your efforts, watch out for changing paths and strike back against the alien invaders in this challenging tower defense game!

Temporal Titans is a Tower-Defense game with Time Travel. Send mechs back to previous waves to prevent your defeat, and protect your salvage team from the monstrous Grell as you scavenge the ruins of a lost earth. Rewind, rethink, and reclaim the future!

Totally Defenceless is a wave-based tower defence game. You will need to protect your energy cores from the invading alien bugs by strategically constructing a maze of towers to alter their path to your advantage.

ReRoad is a Tower Defense game with a brand new concept where the players dig their own paths. You need to consider the locations of the randomly placed towers of the stages as well as the towers you will build and strategically create a path. Stop the enemy through a path you have created!

Freely place a 15-chassis defense network, break visible enemy layers, and time Flux Gates, Protocol choices, commander abilities, and Overdrive across a 20-mission neon tower defense campaign.

Co-op and Single player Tower Defense genre.

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.

Heart of Machine blends top-down tower defense with light roguelite elements. Face an evolving mechanical swarm thousands strong, tailor defenses, upgrade towers with chips, and use real-time support weapons to turn the tide. Build an unbreakable line and save the core from destruction.

Axon TD lets you expand the map boundaries themselves. A huge arsenal of towers and a wide variety of enemies clash in a battlefield that grows to your whims. Engage in single, cooperative, and roguelite gameplay.

Customize your Ships, Upgrade your fleet, and Command your way to victory in this ruthless rogue-lite tower defense/real time strategy hybrid. Take on an enemy that learns from your moves and adjusts its own path. Do you have what it takes to persevere?

Place your towers on a hexagonal grid and fend off waves of ground, leaping, and aerial mechs. Master 8 skill classes, create your own maps with the built-in editor, and face off against friends in Co-op or Versus modes.

TEP the destroyer is a single player tower defense game where you will face alien monsters and ships in ground and space battles! Your strategy will decide the fate of your people in a sci-fi environment of varying difficulties!

A 3D FPS/TPS Tower Defence game in a sci-fi world, defend your base from corrupted robots and unlock better turrets

Scrap Metal Heroes Rebuilt is a real-time strategy game where you can customize a set of 4 robots with over 300 parts and fight them against an AI opponent or other players.

Test your luck in an off-world colony where farming meets tower defense. Protect your homestead with randomized turrets while you fish for resources, complete quests, and grow crops while carefully selling them as prices shift each wave.

Tau Cubis is a mazing tower defense game set in colorful sci-fi landscapes. Use your strategic skills to overcome numerous challenges and advance through the leaderboards.

Royal Wars: Farm TD is a tower-defense game with strategy, luck, resourcemanagement and quick-thinking mechanics. Protect your base with Towersto defeat enemies in your path before they destroy it.

A first person shooter and tower defense blend where players defend against waves of robots. Play alone or with friends to design paths, build towers, and upgrade weapons to protect key areas!

In Space Drilling Station, manage a drilling station on a distant planet. Build a multi-level vertical structure to produce and manage your resources and staff, in order to dominate the competition!

Hold the line in a neon sci-fi siege. Deploy and upgrade 15 distinct towers, expose every enemy's weakness, and survive 50 escalating waves and relentless boss assaults. Every threat has a counter — find it before your base falls.

A sci-fi mining and base-building game where efficient mining is the key to survival. Gather crystals, expand your colony, upgrade your defenses, and withstand increasingly dangerous nightly attacks.

Command humanity’s last defenses in a cinematic sci-fi tower defense game. Build tactical towers, upgrade your arsenal, deploy soldiers, and survive waves of hostile AI forces led by VAELRA.

Build and lead a colony on the surface of an endless Wall. Manage resources and your people, develop new technologies, defend against relentless zyrex attacks, and send robo-spiders on risky expeditions. Keep the colony from collapsing – in Wall World, it's easy to fall.

Sentry System is a tower defense roguelike where you collect, modify and upgrade your sentries while progressing through a network of challenging encounters.

A grand and intense tower defense science fiction game, where you only need to purchase once to enjoy all the content of the game.

A tower defense roguelike about robots and ooze. Play solo or local multiplayer, protect the Glorp, and defeat the creeps. 

In the cyber-future of 2009, the most popular sport has become arena fighting. Challengers from all over gather to attempt to conquer gauntlets of robotic opponents for fortune and fame.