Top similar games like Citadel Zero:

Renegade Run is a rogue-lite deckbuilder that puts you in the pilot seat of an experimental starship. Discover anomalies, carve your path, and face powerful enemies as you battle your way back to Sector 0.

Defeat enemies and get parts! Build your own spaceship!

Super Sanctum TD is a retro-styled Tower Defense game that focuses on strategy, customization and replayability. Build advanced mazes and construct powerful towers to prevent alien hordes from reaching the Core!

A roguelite battle against cosmic evils - drop customized polyominoes, collect relics, and execute powerful combos to defeat your enemies!

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

Fight supernatural creatures with your forces in this fast paced Roguelike RTS game!

A roguelite deck-builder based on "Daifugo". If you can't play a card, you take damage: (Field Total) x (Multiplier). Use battle rewards to customize your deck and special cards in the shop. Strategize and upgrade to defeat even stronger enemies!

Beast Brawl is a unique rougelike which pits teams of primal beasts against one another in a battle for survival. Thousands of combos and strategies to try and evolve your team into the apex beasts of the kingdom.

A sci-fi dice-driven roguelike where your dice fuel both your abilities and your enemies’. You'll need strategy and luck to outwit dynamic foes, harness synergistic upgrades, and escape creeping galactic doom before Fate catches up.

A multiplayer turn-based strategy game inspired by Into The Breach, set on a 9x9 board, where you control characters and protect bases. Create a unique deck of ability cards and characters. Eliminate the opponent while fending off a zombie horde. Become a savior of The South Pole!

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.

A strategic sci-fi rogue-lite deck building game, with unique storytelling and strategic elements.

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.

Build, Upgrade, and then Move your Towers in this unique twist on the Tower Defence genre. With Rogue-Lite mechanics every run offers new strategies, and every death unlocks new upgrades. Grow. Evolve. Destroy the Robots!

Magma Karta is a satisfying strategy card game with roguelite and gambling elements. The rules can switch at any turn, challenging you to adapt your builds and your playstyle.

KNOW YOUR ENEMY. FIRE YOUR CANNONS. A spaceship management and combat game. As the Captain of Silver Wolf, command your crew and use your energy strategically. Change your future with your decisions. Arm your ship and strengthen its shields. Survive in the solar system full of dangers.

Command a fleet of customizable spaceships, go through intense battles and create builds with unique synergies. Think your placements and upgrades as they will shape the fleet's fate and determines victory or defeat. Test your strategic skills in this rogue-like autobattler game.

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!

It's a single-tower defense game that subjugates monsters and clears rounds.

Atlanta TD is a roguelite tower defense game where the armies of the underworld descend onto the Four Spectacular Realms in waves as it falls unto the remaining Gods to protect the city of Atlanta!

Repel the Rifts is a roguelite tower defense game where you lead a commander through an alien world, uncovering new terrain each wave, drafting powerful upgrades, and constructing defenses to hold back the chaos.

We fused deck-building roguelikes and tower defenses in a way never seen before - deploy your towers, collect valuable trinkets and cast powerful spells to defend yourself against the Salkoth!

"Explore 'Stellar Orphans', a captivating deck-building game where every choice determines the fate of your crew lost in infinite space. Forge alliances, manage resources, and resolve crises to guide your 'Stellar Orphans' to survival. Ready to defy the stars?"

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

Face down swarms of enemies using cards with diverse abilities. Evolve your own unique deck to overcome the trials ahead, and become a quick-witted hero who can conquer any crisis. You will be joined by loyal companions OR charismatic fairies who aren't afraid to use you for their own ends.

DEFEND 99 is a rogue-lite tower defense game with deckbuilding and autochess elements. Place your turrets, roll for upgrades, equip Mods and Buddies, balance your economy and prepare your board strategy for enemy empowering weather effects. Can you hold off all ninety nine waves?

Build your own fleet in this space roguelike deckbuilder. Pick your faction, draft cards mid-combat from a rotating market, and fight your way through hostile sectors one run at a time. Can you carve a path to victory through Contested Space?

The roguelike auto-battler where your deck prints itself! Supply a brave worker droid with synergistic blueprints to defend the planet against hordes of alien invaders. Combine hundreds of cards with custom upgrades and infinitely stackable modules to discover broken builds.

Kitchen Crisis is a culinary defense game. You are abducted by aliens and must satisfy their appetite. If you want to live to see another day, efficiently arrange your cooking appliances, upgrade your ingredients and tools! In order to survive, make wise decisions according to everchaning recipes.

A fast-paced Card Battler with Tower Defense action! Claim victory in the Roguelite Deckbuilder campaign and Online Multiplayer. Collect all the factions to explore thousands of strategic combinations.

The early stages of an RTS I created in a gap year. Create your loadout, send your mechs to battle, capture objectives and destroy the enemy base

"Atman Rebel Flame" is a cyberpunk card-building game that supports multiplayer battles with no external numerical growth to ensure fairness . Choose your hero and support cards, elevate your phase and select talents, defeat opponents and claim victory!

Explore the galaxy in Star Deck, a replayable roguelike card battling sci-fi adventure! Rescue your brother from the Federation, an uncompromising totalitarian presence that rules the galaxy with an iron fist. Endless story loops with unlockable new weapons, cards & items will keep you coming back!

Chromatic Odyssey is a real-time strategy roguelike where you command a rising Type II civilization. Conquer territories, harness advanced technology, and adapt to procedurally generated challenges. Deploy powerful abilities and shape the fate of your empire in an ever changing galaxy.

Neon Colony is an isometric tower defense game where you build your own road to access and harvest the resources of an alien planet. Deal with the resistance of the local population and fulfill this noble mission for your generous corporate benefactors.

A chaotic roguelike auto-battler set in a ridiculous sci-fi universe. Assemble bizarre alien teams, exploit crazy synergies, and fight your way through the galaxy with humor and strategy.