Games like Sentinel 4: Dark Star

"2112TD: Tower Defense Survival" is a futuristic tower defense game with strategic base building elements. Defend your refinery from alien invaders across procedurally generated levels with a variety of turrets and special abilities. Upgrade and customize your arsenal to survive increasingly challenging waves in this intense, sci-fi tower defense experience.

"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.

"Sentinel 3: Homeworld" is a sci-fi tower defense game with an epic campaign across 20 levels and over 20 unlockable weapons. A powerful commander unit can level up and gain new abilities, and customization of weapon loadouts is encouraged. Endless modes, Steam achievements, and exclusive music by Specimen A are also included.

"Anomaly Defenders" is a reverse tower defense game where players protect an alien tower from human invaders. Players strategically deploy and upgrade defensive units, utilizing special abilities and upgrades to fend off the human threat. With a focus on fast-paced, tactical gameplay, Anomaly Defenders offers a unique twist on the traditional tower defense genre.

Defense Zone 3 Ultra HD is a challenging tower defense game with improved graphics and new units. Players must strategically place and upgrade towers to defend against incoming enemy forces across diverse landscapes. With multiple difficulty levels and various game modes, Defense Zone 3 Ultra HD offers a rewarding and engaging experience for fans of the tower defense genre.

"Kingdom Rush Frontiers" is a challenging tower defense game with numerous upgrades and special abilities. Players defend their kingdom against various enemies, such as bandits, dragons, and mummies, across diverse stages like deserts, jungles, and underwater worlds. The game features heroes with unique abilities to aid in battles and adds a reinforcement system to strengthen towers during intense fights.

"Tactical War: Tower Defense" is a challenging tower defense game that tests your strategic skills. Protect your base with 5 types of upgradable towers, using special abilities like teleport and mine to aid you in difficult situations. With 20 balanced levels and the ability to destroy landscape objects to place more towers, this game offers a unique twist on classic tower defense gameplay.

"Kingdom Rush is a popular castle defense game with four types of towers and numerous enemy models. Soldier towers summon troops to halt enemies, and upgrades enhance tower capabilities. Consider enemy weaknesses when placing towers to successfully defend your realm against various foes."

In "Risen Kingdom," players build and manage their own kingdom during the medieval era. They gather resources, establish villages, and recruit soldiers to defend against enemy invasions. The game features strategic city-building, real-time battles, and diplomacy with neighboring kingdoms, all with a fantasy twist.

"Revenge of the Titans" is a real-time strategy and tower defense game where you must defend Earth's bases from relentless Titan attacks across the solar system. Assemble defensive positions with turrets, droids, barricades, and mines, while managing funds by mining nearby resources. The game features a 50-level campaign, endless and survival modes, and numerous buildings and technologies to research.