Top similar games like Spectrum Defense:

Spectral Realm is a top-down tower defense Rogue game, where players need to play the role of an astronaut who has just landed on a different planet to block a constant stream of attacking native creatures and continuously strengthen themselves with the gems contained within their bodies.

A 2D Touhou fan game combining tower defense, tower merging, RTS-style control, and chaotic bullet-filled battles. Merge Touhou characters, build your defense, and compete for the fastest clear time on the leaderboard.

A hybrid card game and tower defence where the hands you play become the towers you build. Defeat the enemies approaching the bear's den and find modifiers that support the elements of your defensive strategy.

An epic, challenging tower defense game with an emphasis on strategy and replayability. Summon gems of immense magical potency and harness their unique abilities against a seemingly endless horde of monsters. The archdemon seeks to swallow the world, and you must journey to stand against her.

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.

Upgrade and evolve, expand your territory, and build mighty defense towers to repel hordes of monsters.

Journey through colossal dungeon floors, gather powerful heroes to defend your castle, and discover legendary treasures and ancient artifacts. In the Towering Dungeon, Tower Defense meets RPG adventure. Explore, summon defenses, customize your heroes, and overcome deadly dangers during your ascent!

Play as the King of Cards or the King of Chess in this fresh take on the tower defense genre. You can play as the enemy trying to sneak past the towers or play as the towers themselves. There are many upgrades for each side and lots of content to unlock!

The Battle for Wesnoth is an open source, turn-based strategy game with a high fantasy theme. Explore the four corners of Irdya in seventeen solo campaigns and dozens of multiplayer maps, taking part in countless adventures as you go.

Collect your insect army and defend the hive as either Ants or Bees in this awesome tower defense adventure, brought to life with a hand-drawn art style!

A tower defence where every enemy has a weakness and every tower can overheat. Slow, burn or shock an enemy to open it up, then bring it down. Twelve boards, four tower types, element pads, a skill tree between runs, and an Endless mode on every board you beat.

In Sunstone War: Prologue, you can lift any interactive object, including defense towers, obstacles, and even enemies. Experience frantic fun and a level of freedom never seen before in this Tower Defense game, where you no longer have to wait idly for the enemy's attack!

Defend your mind against psychic invaders in this conspiracy-themed roguelike tower defense. Decalcify your pineal gland to gain access to the akashik records, uncover the truth, and descend deeper into the iceberg. How far down the rabbit hole will you go?

The tower defense that thinks back: the swarm analyzes your defense, develops resistances and sends saboteurs. Counter with 6 elements, powerful combo towers and support totems — solo, in co-op up to 4 players or in versus duels up to 4.

Defend the energy cores from ever increasing enemy waves by destroying their spawn gates. Build tower mazes on Hex grid. Adapt them to dynamic changes in the terrain. Face quirky bosses. Design your own levels and share them on the Steam Workshop.

We've traveled to the past to conquer these fertile lands. Now, you must defend them from the blood cult intent on taking it for themselves. Be careful though: from where their blood is spilled, ancient magicks empower whomever is still alive.

Who would’ve thought that a roguelike, card game, and tower defence could come together over a basket of food? Travel through magical lands filled with hungry creatures, collect cards and artifacts that shape your strategy with every run. Escort your food through this whimsical fantasy world.

Tiny Tactics is a Tower Defense game with a heavy focus on mazing, with mechanics inspired by the Auto Chess genre.

In this tower defence game, you enter the world of Magonia and defend it against hordes of humans, orcs, ogres and other evil forces. Fight in different areas and adapt your strategy to the terrain and the enemy forces.

Hextalia is a hex-based strategic Tower Defense where you get maximum control over the board. Build pillars to shape the paths of your enemies, experiment with endless build combinations, and discover different levels-each comes with its own unique challenge.

Last Throne is a tower defense strategy game set in a dark, mist-shrouded world on the brink of collapse. As the ruler of the final kingdom still standing, you must command your defenses, outsmart relentless waves of monstrous creatures, and make crucial tactical decisions to hold your ground.

A classic 3D Tower Defense fantasy game, made by a very small and dedicated team.

A light tower defense game with unique planet exploration. Defend against aliens, collect resources, and build a new home. Exquisite graphics and challenges await!

A Tower Defence where your own towers have friendly fire, creating a Bullet Hell style game that encourages an active playstyle, where you can’t just sit back and relax while thinking about anime girls.

Creeper World 3 is what happens when cellular automata takes over a strategy simulation. Instead of discrete units that attack your base, a fluid-like substance spreads over the terraformable terrain. Your base, your weapons, your strategy... you must adapt them all.

Voxelia Defenders - is fast-paced, fun and engaging tower defense game, that will take you into the magic world of Voxelia!

Skyward Bastion is a roguelite tower defense game set on floating islands. Build and upgrade your defenses, unlock new strategic possibilities, and adapt your run to procedurally expanding maps.

This is a strategy tower defense game where players need to choose the appropriate defense towers based on different maps and enemies. The game also offers a variety of defense towers, maps, and an endless mode waiting to be unlocked by the players!

Fight off hordes of monstrous mutants created from a strange cataclysmic event in the new tower defense game, Prime World: Defenders. Join a group of exile treasure hunters who have ventured into the capital of an ancient empire, vast with mystery and danger.

Defend your dungeon against an onslaught of heroes in this physics-enabled tower defense. Build your dungeon tile by tile, placing deadly traps to protect your loot. Upgrade your defenses and powers as you amass wealth and unleash havoc on these cheese wheel-stealing 'heroes'.

A strategic space tower-defense game. Enemies detect, warn, and try to bypass defenses, forcing you to adapt. Combine diverse towers and face unique maps for varied battles. With tense sci-fi atmosphere, it delivers a fresh experience beyond traditional tower defense.

Competitive endless sci-fi tower defense game with global leaderboards where you strategically place and upgrade Glowbots to stop waves of enemies across vibrant space maps.

hexurb is a calm, peaceful city builder where you can relax after a hard day and just have a good time!

Turn-based wizard combat with the tactical positioning of chess and the bluff of poker. Features wizard customization, 100s of gear items, single player realm adventures, online leagues and co-op play.

Prototype TD 2 is a rogue-like tower defense game which focuses on replayability, giving the player meaningful decisions and a different experience each game. Design the route that enemies will follow and combine your tower types to adapt to a wide variety of procedurally generated maps.

Build deadly mazes and outsmart a rogue AI in this strategic tower defense game. Adapt your defenses, use aiming parameters to your advantage, and activate powerful perks to survive increasingly complex waves of incoming robots.