Top similar games like Under the Ruin:

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.

Take command of civil air defense under constant threat. Build radar networks, manage power and resources, and decide when to sound the sirens. Every choice has consequences. Hold your cities together as escalation turns survival into strategy.

A procedurally generated sandbox survival game with RTS elements.

Build, manage, explore, and survive. Develop your village, discover new islands, face threats, and decide how your colony will grow.

Raise a fallen keep by day, and hold it through the dark. Villagers with names and tempers fell timber and work the fields — then take up spears when night comes. A dark fantasy settlement-builder defense game.

Defend your base from all directions in this no-path tower defense. Build, upgrade, and adapt to unpredictable enemy waves, survive unique boss fights and unleash the Quantum Decimator when things get overwhelming.

A game in the genre of management strategy. Here you can build your own factory for the production of robots, and on another planet, and extract resources and test robots on other different planets.

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.

Wasteland Train is a 2D train management strategy game set on a post-apocalyptic rail network. Command an expanding mobile base, trade between isolated cities, recover crystal cores, develop technology, and survive raids, broken tracks, acid rain, and toxic fog.

Prepare for an epic battle in this captivating tower defense game! Build, defend, and triumph as you strategically place towers, manage resources, and upgrade your arsenal to fend off relentless waves of enemies.

Collect resources and establish a defense line before dark And then Facing countless enemies

ATC is a base building game set in a post-apocalyptic world featuring urban environments. Build a base across several layers with dozens of survivors. Fight other factions for the control of the remaining production centers and explore the world to find long forgotten resources and technologies.

Defend Rome's frontier in a strategic tower defense campaign. Build and upgrade specialized defenses, manage your gold, adapt to enemy formations, and hold the line across challenging handcrafted battlefields.

Defend against waves of invading balloons in this colorful tower defense adventure. Place and upgrade 8 unique towers, including fire, slow, explosive, and sniper types, across 20 challenging levels. Mix strategies, complete goals, and try to beat the developer’s high score!

A first-person strategy game blending colony building, lane-based battles, tower defense, and action combat.

Defend against evil snails with a variety of plants in this Tower Defense while YOU have to make constant decisions how your enemies get stronger.

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.

Build an armored train and defend it against relentless mutant hordes. Mount turrets, recruit crew and make every stop count in a top-down roguelite tower defense where your base never stops moving.

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 by day. Survive by night. A focused medieval tower defense where every decision is permanent.

In Vermin Control, you will enter a thrilling sci-fi tower defense world filled with strategic combat and high tension. Operate a versatile unit capable of both melee combat and construction, deploy and manage 9 unique devices, and protect key facilities from relentless vermin assaults.

WE ARE REBELLION is a strategy and simulation game in which you command a warship with a crew of rebels. The game is set in the distant future, in a world that has been ravaged and polluted by capitalist corporations.

A medieval strategy game with indirect control where you fight, achieving victory through rational decisions and smart unit composition. Beware of Vikings approaching the island. Remember, the one who adapts best wins.

A game of base building and colony simulation in a world where night is permanent. Survive, build, explore, repel enemy raids and tend to the needs of your workers and your king.

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.

Dive into Eleven Sunrises, an explosive blend of Action-RPG and Tower Defense. Explore a post-apocalyptic open world to gather a devastating arsenal, then deploy your forward bases to annihilate waves of ruthless enemies.

Aim, fire, and fortify. Shogun's Stand is a fast-paced tower defense where you take direct control of your castle against relentless waves of feudal enemies. Place traps, command the battlefield, and level up to survive!

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.

Command your forces from above or take direct control on the ground. Operative Division is an intense RTS-TPS hybrid set in a post-apocalyptic world. Manage finite resources, execute surgical tactical maneuvers, and unleash devastating superweapons in a battle for humanity's future.

Last warrior of the Herbheim's clan, it's your duty to defend the last family mine

Gattai TD is a roguelike, mazing tower defense in which you merge towers and gain ancient wonders to hold back waves of cursed keepsakes.

Eternal Siege is an evolutionary tower defense based around min-max resource management, efficient use of spells, and (hopefully) building some towers. Start in the Ancient Greek era and defend your way through the human eras (Roman, medieval, modern, etc). Can you survive the human extinction era?