Top similar games like Down Abyss:

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.

A pixelated 2.5D RTS meets tower defense as you battle mutated ants in a short campaign. Build walls, place turrets, and hold the line to reclaim Earth's surface in this tactical fight for survival where placement of everything matters.

Something tore a hole in the world, and it's pulling everything down. Build a factory on the rim of the void, automate every step of production, and hold your ground when the dark comes for it. Stabilize the rift, drop to the next layer, and do it again, deeper, richer, and far more hostile.

Power the Unknown is a strategy game where you build a base on an unexplored planet and defend it from swarms of hostile bugs. Mine resources and generate enough energy to power your ever-growing base.

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.

Fight ever-mutating bacteria and viruses, collect gene modules from fallen pathogens, evolve and strengthen your immune system, unlock a variety of medical interventions, and create powerful synergistic builds to survive an ever-escalating infection.

Crushed is a short-ish game about a man named Norman trying to find his ships lost radio to call for home...things however won't be that easy.

Step into the arena with IDUN: Prologue, a thrilling slice of our full-length defense RTS where real-time strategy meets rogue-lite chaos. Fight your way through unique mission objectives with overwhelming swarms of enemies.

A first-person roguelike buried in a Cold War ICBM bunker under alien siege. Defend the missile. Drill through soil, tunnels, caves and even ancient temples. Collect resources, craft items, upgrade everything. Burn coal to keep bunker running. Find two launch keys. Fire. Kill the mothership. Repeat.

GlowFall is a sci-fantasy survival game where light is scarce. You must explore the bioluminescent environment to harvest flora, mine ores, catch aquatic creatures, interact with land creatures, and defeat abyssal entities. Resources gathered along the way can be used to craft helpful items.

The ultimate space capital ship combat compendium is the evolution of hard core space combat sims. The only game of its kind currently in existence.

Infinitory mixes city-building, automation, and tower defense in a in a rogue-lite top-down game. Expand your base vertically in limited space, a strategic planning challenge. Automate resources to produce ammunition and upgrades, crucial for stopping waves of enemies on procedurally generated maps.

Lead a squad into the ruins, scavenging resources while fending off relentless swarms.​ In this ​​unique, expansion-style tower defense game​​, explore regions, grow your forces, and stop the cataclysm to save humanity.

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.

Dead Night Highway is a compact colony simulator where a group of survivors on their journey west sets up camps to replenish resources, but zombie horde only grows larger...

Come and hunt the monsters of the night! Destroy waves of monsters and welcome the dawn of victory!

Sky Fields is a Voxel Monster-Tamer. Recruit, battle and trade Goobers to build your ultimate team! You'll need a well-structured team with tanks, supports, and damage dealers to progress far on your journey.

A living space fungus is eating our colonies, and it grows back faster than you can shoot it. Build turrets, call in orbital strikes, combine flamethrowers, tiny suns and lightning, and hold the line until HQ nukes the source.

Get rich or get eaten. Build underground factories, automate production, and defend against parasites in this 1-3 player roguelite.

You are the first eukaryote of Nephele! You have nothing but wisdom! Use your wisdom, to survive in such a cell-eat-cell world, and construct your cell civilization!

Survive the apocalypse your way. Choose between deep strategic campaign or classic arcade mode. With 16 heroes, vast customization, and a unique Bonding System, unlock 216 endings across over 6 billion procedurally generated challenges. This is survival, redefined.

Build the supply lines that keep your guns firing. Feed the Front is a sci-fi RTS where resources and ammunition fly between buildings. Mine small planets, automate logistics, and defend your expanding base against rival commanders and alien bugs.

"In 'Random Core Defense,' acquire and enhance cores using limited resources to withstand relentless enemy onslaughts. Defeat powerful bosses and test your strategy to survive until the very end!"

A defense RTS where you can move turrets at will. Extract resources, upgrade technology, and defend against enemy swarms in a gripping space campaign. Hold the line, set up your turrets, and brace for screen-filling hordes!

Survive waves of enemies in Ash Warden, an incremental tower defense where you slowly become overpowered. Unlock new abilities, fight against powerful bosses, and evolve into an unstoppable force against the endless Redgaze hordes.

Endustry is a game about building, exploring and surviving. Build machines and conveyor belts to collect resources. Try to survive with or without enemy waves depending on which game mode you play.

Crash-land on a dying alien world and bring it back to life. Build automated factories, master real chemistry and nuclear physics, and terraform the atmosphere one gas at a time — while sandworms hunt the power signature of everything you build.

A factory that makes bullets, turrets that fire them, and a horde of living scrap that wants your metal. Design your ammo module by module, from junkyard tinkering to the far future, coached over the radio by Granny Odette.

Build and nurture the universe of your dreams with Land of Babel; an expansive simulation city builder. Construct and manage powerful empires, establish intricate and detailed economies, explore unknown lands, embark on captivating quests, and much more.

Dust Raiders is a management strategy game, set in a lawless wasteland. Upgrade your vehicles, engage in tactical fights against raiders hunting for your resources and gather a crew to rule the area.

Build an autonomous colony on a living procedural planet. Gather resources, command robots, expand your power grid, and defend the teleporter from an ecosystem that reacts to every step of your growth. Activate the link—or lose everything.

This game is a pixel-styled, turn-based sandbox game. Collect around 50 items and build or find 100 obstacles accross the world. Build ships to cross water and enter the caves to collect advanced resources. Fight 2 bosses and level up.