Games like Colony Siege

In "Infested Planet" , you command a small squad of soldiers against an overwhelming alien force, using strategy and tactical thinking to outmaneuver and outsmart the enemy. With 100,000 aliens closing in, you'll need to build defenses, equip your team with advanced weapons, and launch surprise attacks to capture and destroy alien hives. The ever-mutating alien army keeps you on your toes, demanding constant adaptation and innovation to survive.

Defense Grid 2 is the sequel to the original tower defense game, Defense Grid: The Awakening. It features a new story campaign with 21 maps, dynamic level movement, and an expanded cast of characters. The game also includes challenge mode experiences, multiplayer modes, and a level creation tool set for players to create and share their own levels. The Steam Special Edition comes with additional content.

In Siege of Centauri, you assume the role of protector for Earth's first interstellar colony, located in the Proxima Centauri system. Faced with a ruthless alien invasion, you must strategically deploy defense structures and utilize orbital abilities to repel the attackers. With a variety of customization options, adjustable difficulty, and multiple game modes, this real-time strategy game offers an engaging and immersive experience within the Ashes of the Singularity universe.

"MarZ: Tactical Base Defense" is a strategy game that challenges you to build a defense base and fight off zombie hordes on Mars. The game features a 20-mission story campaign, skirmish mode with customizable waves of enemies, and an intense "Outbreak" mode. Utilize powerful terraforming tools to create custom maps and share them via Steam Workshop, and research new upgrades for your towers. Recently updated with increased technology options and reworked balancing.

Defense Grid: The Awakening is a tower defense game where players protect their base by building fortification towers against incoming enemies. With 8 hours of main storyline and many more in challenge modes, each level is highly replayable and can be solved in various ways. The game features 15 different enemy types that increase in strength over time, providing a wide variety of challenges.

"Sol Survivor" is an intense turret defense game where players must defend their colony and colonists from enemies. Players can actively control orbital support such as lasers and artillery to aid their turrets, of which there are 26 different types. The game features 10 unique executive officers, each with their own combinations of turrets and support, providing diverse playstyles. Cooperative and competitive multiplayer modes, as well as a new Survival mode, are available for players to test their skills.

"Ancient Planet" is a Tower Defense game where you defend an ancient civilization's stronghold from invasive alien hordes using upgradable towers and diverse strategies. The game features 40 unique levels, a variety of enemy types, and improvements that can be reset and redistributed at will. The game's storyline and setting are based on the memories of intergalactic war veterans and were created with input from the High Council of Intelligent Civilizations of the Galaxy.

Iron Marines is a real-time strategy game that puts you in command of a powerful army of space-age soldiers. Battle against alien threats and challenge challenging missions using cutting-edge technology and cunning strategies. With a variety of units, upgrades, and heroes to choose from, every playthrough offers a unique and engaging experience.

Warstone TD is a fantasy tower defense game where players strategically place towers and units to defend against hordes of enemies. With various game modes, heroes, and towers to choose from, each level presents a unique challenge. The game features a compelling story campaign, online PvP, and co-op gameplay, offering a rich and immersive tower defense experience.

Warpips is a single-player real-time strategy warfare game with exceptional gameplay, delightful graphics, and exceptional music. The game features easy-to-learn but hard-to-master mechanics, with randomly generated battles and no complex micromanagement. With a diverse roster of units, a fully unlockable upgrade tree, and infinite strategic combinations, Warpips promises a highly replayable experience with no microtransactions or pay-to-win.