Top similar games like Sigma Protocol:

Co-op and Single player Tower Defense genre.

Element TD 3 takes the tradition of combining powerful elements for unique towers and adds heroes. Infinitely replayable and endless, this is a Tower Defense that blends classic gameplay with modern additions. Play with up to 8 players cooperatively or competitively.

Take command of a carrier strike group, a destroyer squadron or a lone submarine in a real-time naval tactics game. Outsmart, outmaneuver or outgun enemy fleet on, under and over the seas.

Element TD 2 sees you combine powerful elements to create unique towers. Prove your defenses against challenging foes, and compete or cooperate with others to determine who has mastered the elements.

Command territory directly in a real time strategy game with no squads to micromanage. Expand borders, connect supply roads, and break enemy lines. Includes five historical campaigns, Skirmish, a built in map editor, and online multiplayer for up to eight players.

"Slime Battle" is a fun multiplayer game where you play as adorable slimes! Outsmart rivals in tactical territory battles with friends or online players. Diverse modes offer endless fun—expand your slime empire through strategy and skill. Join now for thrilling, fast-paced competition!

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

A fast, minimalist real-time strategy game that plays like a tabletop wargame come to life.

Two empires, one sea. Tides of Empires is the tower defense roguelite game you can finally play competitively. Command warships, aircraft and submarines in ranked 1v1 & 2v2 duels with real MMR matchmaking, in a challenging campaign and endless Survival. Rule the tides.

A minimalist multiplayer RTS autobattler about tiny strongholds and enormous armies. Build troop spawners and defensive towers, counter enemy hordes across three lanes, and topple their castle.

Bunker Defense is a tower defense game for 1-4 players. Waves of enemies attack your base, and you must defend it by building different kinds of defenses.

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.

Stellarcraft is a sci-fi tower defense adventure: explore alien planets, gather resources, build defenses, and fend off waves of enemies, solo or in 4-player co-op. 🚀

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.

UNITED COMMAND is a military base building real time strategy game with a 2 player co-op campaign. Drop into a mission and fight side by side with a friend against the enemy AI. Use your dozer to build out your base and gather resources to fund the construction of your tanks, infantry, and aircraft.

Defend your kingdom against legendary monsters. Place turrets strategically to block their path. Upgrade your defenses to fend off enemy hordes. Become the legendary guardian of the earth alone or in co-op!

An incremental war game where technology and magic clash. Gather resources, unlock units and upgrades, and grow from small battles to massive wars.

Great strategy is timeless. Build, adapt, and defend across dynamic maps, solo or online - every session brings new strategies, new solutions, and new surprises. Now is the perfect time to enter the grid.

A 3D modern real-time war game, realistic 3D style, the classic RTs of the second-generation continuation of End War RTS, stimulates the fast-paced sense of attack

Plunder Protocol is a unique mix of RTS, MOBA, auto battler and tower defense turned base builder. Designed for players who love strategy but hate micromanagement. Build your base, recruit units, and outsmart opponents with strategy instead of fast clicks.

A desolate realm, kept in flux by the rhythm of battle. A proving ground for those with great ambition. A Year Of Rain is the ultimate team real-time strategy game. Choose your faction, team up and take control of a legendary hero to lead your armies!

"Dynasty Rush" is an official Chinese-themed TD game. Command legendary heroes and unique towers across iconic Chinese landscapes. Experience deep strategy infused with rich culture as you defend the realm. The vast empire awaits your command!

A casual and relaxed strategy game that is easy to play, yet difficult to master. Counter enemy waves by building and upgrading the right units. You make the decisions, the rest happens automatically. Set in a sci-fi theme with more than 30 unique units and 70 unique upgrades to choose from!

This is a class-based tower defense game which challenges you and your Twitch viewers to work together. In Stream Defense, your viewers can play alongside you by typing commands into chat. Each viewer has full control over their character. Your viewers can even continue playing while you sleep!

Carry and throw your units into position, resupply their ammunition, and defend against waves of enemies in this chaotic couch co-op tower defense for up to 4 players.

Xeno Conflict is a real-time strategic survival game based on a future background, where players can control different factions compete and cooperate with each other to fight against unknown biological environments.

Hidden Front is a military real-time strategy game for up to 6 players. Deploy your army, scout through the fog of war and combine infantry, armor, artillery and air support. Fight other commanders or team up with friends against bots.

A massively multiplayer real-time strategy game pitting hundreds of players against one another. Over one million nuke each other every month.

Type to survive! "Typing Clash" is a fast-paced strategy battle game where every word summons units and every keystroke shapes the battlefield. Build your army, unleash powerful skills, and out-type your opponents in chaotic real-time battles.

Take on waves of enemies alone or with friends, up to 4 players. Use a myriad of armed cats to defend yourself and customers in this tower defense style game. Keep pouring coffee and shaking eggs out of chickens as the onslaught progresses to earn extra cash!

"Godcall Defense Line" is a multiplayer cooperative game. It combines action, strategy, real - time strategy, and tower defense. Players can summon gods, ghosts, beasts, heroes, and build defenses like walls and guns to fend off continuous enemy attacks.

A tug-of-war strategy game for up to six players. Build works that train your army on their own, send it down the lanes and push the front to the enemy keep. Upgrade your works, capture crossings for new units and cast spells from your tower.

Free-to-play 4v4 War MOBA where you play as a Giant, lead an army of soldiers and deploy tactical structures known as "Battleworks" on a ravaged urban battlefield. Request access below for a chance to join future playtests

Choose your alchemist from a magical coven. Explore a hand-painted, post-apocalyptic fantasy world. Fend off hordes of magical beasts in this roguelite tower defense and survival game. Play solo or in co-op with up to 3 friends!