Top similar games like The Bastion Protocol:

Command massive space battles where thousands of ships clash in real time. Build your fleet, choose a doctrine, reinforce the battlefront, unleash commander abilities, and adapt as unexpected events turn the tide of war in this mashup of strategy and auto-battler.

An incremental swarm tower defense. Play solo or 2–4 player Steam co-op. Defend a doomed mining colony through a full campaign, infinite procedural maps and Workshop creations. Build towers. Call orbital strikes. Kill billions. The only good bug is a dead bug. Do your part!

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.

A rogue-like sci-fi Tower Defense strategy game with infinite replayability!

Optimize, automate, and scale your defense to survive increasingly challenging waves in this addictive incremental tower defense.

A Roguelike Tower Defense in space with missions to conquer. Can you hold against the spreading alien bosses? Build and upgrade towers against the corruption. Choose your technologies and warpspeed your way to victory.

Draw the enemy's path, build powerful towers, and defend your castle against thousands of enemies in this roguelite tower defense game. Conquer procedurally generated maps, unlock permanent upgrades, and grow stronger with every attempt!

Survivors is a tower defense game mixed with roguelite elements. Place your survivors, test your strategy, lose, earn resources, upgrade your defenses and try again, stronger.

Grow your organism, gather biomass, and expand your colony. A casual, short mouse-driven incremental game focused on growth and progression.

Sir, We Have an Orc Problem is an incremental style tower-defense game where you face an overwhelming amount of orcs. Place and upgrade turrets and let bombs rain on the horde.

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.

Command a fleet of customizable ships in this roguelite strategy autobattler. Liberate planets to unlock new ships and powerful upgrades. Engage in strategic battles, manage your fleet, and face escalating challenges as you fight to free the universe through increasingly difficult galaxies.

Fishing Cat - An Incremental Fishing Game is an active incremental game where you cast your line, reel in the big catches, and build your fortune one fish at a time.

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.

Pull the lever! Pray for good towers! Then hold the line against THOUSANDS of tiny walking coins in a tower defense where the house throws everything it has at you. You load the reels. The slot machine deals your towers! The Odds Are Stacked Against You. PROVE THEM WRONG!

Galactic Simulator 2: Stargate is a roguelite simulation game inspired by the Fermi Paradox and the Great Filter. Pilot your ship, gather resources, build stargates, and discover other civilizations as you explore an ever-evolving galaxy.

This "spaceship simulation roguelike-like" allows you to take your ship and crew on an adventure through a randomly generated galaxy filled with glory and bitter defeat.

Defend your planet from relentless stream of incoming asteroids in this fast-paced 2D tower defence game. Strategically place defensive buildings and upgrade your arsenal to protect your world from destruction!

Defend a lone Core against waves from every direction. Collect the scrap enemies leave behind, build production chains and automated turrets, then carry your upgrades into the next, harder chapter. A sci-fi base-defense campaign across 4 acts, plus prequel and skirmish modes.

A cozy incremental game about shearing sheep, collecting wool, earning gold, and unlocking upgrades to grow your flock.

Abyss Forge is a sci-fi match-and-merge roguelike set in deep space. Move tiles, create matches, merge modules, gather fuel, efficiency, research, and other resources, then shape your build through random upgrades as you push your ship deeper into unknown sectors.

In this roguelike tower defense, explore the remnants of an ancient biological preserve! Build an army of animal-machine hybrids and collect ancient artifacts from across the multiverse to fight against the ancient experiments left to rot, while the station crumbles around you.

Recruit from more than 15 unit types, choose your Champion, and defend Coroaforte in a tactical defense game with roguelite progression. Combine units, plan your formation, and cast spells to stop the hordes. Between runs, unlock allies and chart your path through a branching skill tree.

Refactor is a hard-core tower defense game that combines modular building, route planning, and element composition.

Endless cubes. Seven colors, seven currencies. Click to crush or build auto-turrets. Upgrades, prestige system, perks, and boss waves. Neon minimalism. Endless progression.

A last-stand auto-battler on a dead magic world. Choose your heroes, upgrade their abilities, and try to hold on one more night.

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!

Your turrets don't fire themselves. A tower defense clicker where every shot is yours to take. Build defenses, manage your island economy, and send pollution crashing into the enemy island before they bury you.

Project Astra Dominium is a Tower Defense game with Basebuilding and Automation elements. Build up your base to become a supply hub for Earth's desperately needed materials, gather resources while defending against an unknown alien threat and improve your tower's and AI capabilities.

Create immense wealth, build a rebel army, and overthrow the crown in this medieval economic strategy game. Trade daily, invest wisely, bribe royal scouts to stay hidden, and rally fellow nobles to survive clashes against the King's forces.

A tower defense game where mechanics evolve through your choices. Strengthen classic tower defense, blend in other game genres, or abandon tower defense entirely. Each level unlocks a fresh ruleset, making one purchase feel like many games in one.

Scrap Bastion is a strategy tower defense game where you manage your city, equipping it to survive the waves of mutant creatures, testing your planning and decision making capacities at every turn. Watch out, as time is crucial to win!

The fusion of deck-building roguelike and tower defense returns, bigger than ever! Build your deck with powerful new cards, unlock unique trinkets, and deploy enhanced towers to overcome relentless waves of enemies and new strategic challenges.

An incremental space-industry game set in a simulated star system. Extract resources, fabricate goods, and build automated Space Force fleets to defend your planets from enemy sieges. Ascend to a newly generated star system and keep your permanent upgrades.

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.