Top similar games like The Extinction Directive:

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

Star Ash Fleet is a groundbreaking real-time strategy game that transcends tradition. Set against a holographic 2D battlefield simulating interstellar warfare, players assume the role of a newly appointed Federal Fleet Commander, crafting their own war epic across the vast galaxy.

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.

Molten Armor is an action tower defense game with a non-linear story in sci-fi setting! Command defenses and stop hordes of enemies! Fight on land, sea and in the skies!Decisions taken in the heat of battle will change the course of the war.

Build powerful defenses, collect loot, combine effects, and survive evolving waves from the void in a tower defense game driven by ARPG-inspired buildcrafting and persistent progression.

Defend real cities from night raids on a satellite map of the Earth. Build launchers, nets and radar by day. At night, hunt drones and missiles in the dark before they hit: every strike that gets through puts a city's lights out.

This is a 2D defense game that depicts the near future that may arise from climate change. Unlike the defense game, which is automatically attacked by traditional turrets, it is an attractive game that requires you to defeat the enemy by operating the turret directly with limited power.

Kaiju Tactic is a Real-Time Tactics + Roguelike Monster strategy game! Mutate, Modify, and Evolve your monsters! Command your strongest monster squad through Roguelike stages!

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.

A strategic tower-defense where you control powerfull drones. Unlock new tower and use specific technologies to defend your base on Thukothea!

'Alignment Zero' is a Real-Time Tactics game with Pause. As the commander of a Private Military Company (PMC) strike force, control your troops and complete missions. Build your squad, select equipment, and develop a tactical plan for battle.

Lead the Mobile Infantry in this RTS game set in the Starship Troopers film universe. Balance your army composition with a diverse set of unit types, overcome line-of-sight and line-of-fire challenges through tactical positioning, and use special abilities to smash the Arachnid hordes!

Tower Defense meets a Visual Novel narrative. Place an arsenal of towers to halt the invading enemy. Use special abilities such as napalm strikes, EMP blasts, and orbital lasers. A sci-fi space drama, filled with dialogue choices.

Taur is an action-strategy sci-fi game. Control the Prime Cannon and unlock all of its powerful weapons and abilities. Build turrets, droids, aircraft and more as you fight to protect the homeworld of the Tauron droids against a relentless invasion. Will your Taur stand against the Imperion warmachine?

Command fantasy armies, make tactical choices, and observe epic battles unfold in this re-imagination of an old school classic!

Build fortified bases, protect your ore and power networks, and command infantry, armor, aircraft and warships in a near-future single-player RTS. Lead an eight-mission campaign or customize skirmishes against rival AI commanders—with an AI ally at your side.

Red VS Green is a no frills tactical simulator that focuses on troop movements rather then building speed. There are 3 basic units in the game Red Androids, Green Androids, and Blue Androids. Blue androids are neutral. The main battle is between Red and Green.

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.

2089 - Space Divided is a classic science fiction real-time strategy game in which you collect resources, build up your base, train troops and destroy your opponents with tactical skill.

Join our machine legion to conquer the world.

Byte Lynx is a fast-paced RTS with no units. Build defenses, dismantle your enemy, and steal their buildings in this deeply tactical building combat-based strategy game. Expand your arsenal across a series of diverse levels!

Protect the base from an alien invasion. Place cannons and destroy the invaders. Upgrade cannons to resist the enemies.

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?

ASSEMBLE AND COMMAND YOUR SPACE FLEET TO VICTORY

The unstoppable fluid enemy has returned and destroyed every world in its path! Defend against Creeper as it floods across the 3D terrain in this real time strategy game where the enemy is a fluid.

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

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.

The hungry Gooper swarm threatens intergalactic peace. Stop them! Build towers around planets and take control over their orbits. Spin them with all you’ve attached! Collect new towers, powers and upgrades to beat the onslaught of goopers and save the galaxy in this colorful Tower Defense Roguelite!

Design your own spaceships and assemble a fleet to fight in epic PvP battles. Ships are fully destructible and manned by persistent crew members including yourself. Ranked/casual matchmaking, PvE for practice. Show your creativity, strategy and tactics to defeat the enemy Admiral!

Drone Swarm is a very unique take on tactical games. Control 32,000 drones in quick, fast-paced fights. Combine your swarm abilities and counter constantly evolving attacks of your opponents. Survive varying enemy waves, get upgrades to your swarm, and make it to the next system alive!

Warpips is the ultimate quick to learn but amazingly deep tug-of-war strategy game. Deploy the right composition of soldiers, tanks, helicopters and planes in this tight, streamlined strategy-focused war game. Compose the best army, research the right tech; overwhelm your enemy!

Command fleets across whole star systems in real time. Hold the warp gates, cut the enemy's supply lines, launch your carriers' wings and tear open a rift to jump a titan behind their lines. Three factions, three story campaigns, and wars from 1v1 duels to sector-wide conquest.

Are you prepared for a thrilling toy army tower defense adventure? Welcome to the Toy Shire! Battle diverse foes in various locations, defend your family, and repel foes from your area. Save the world by strengthening your defense with toy towers! FULL GAME AVAILABLE NOW!

A sci-fi real-time strategy game. An existential war among asteroids in classic RTS style. Build and defend, produce and upgrade, attack and annihilate!

Loop Defense is a single-player sci-fi tower defense game. Build enemy routes with base walls, assemble a modular defense, manage limited loadouts, energy, and research, face armored, flying, carrier, and wall-breaker units across a star map, or challenge Endless Mode.