Top similar games like Defense of the Earth:

A space theme of a small casual shooting game. There are two perspectives, the character and the ship. The player can control the character/ship, dodge or shoot enemies, and replenish energy and various items consumed by collecting. Collect discarded parts and items to enhance character abilities.

Defender's Squad is a sci-fi vertical scrolling shooter 2D that combines 7 different levels. Play Solo and pick one of the 3 ships to kill enemies and save the earth from aliens.

This is a rogue-like top-down shooter where you control a spaceship that is sent out to explore the caves on the Moon. Once you enter the caves, you find out that there are enemies. It is up to you to survive against them while also trying to find the path down to the next level of the caves.

Become an agent of vengeance in this bullet-heaven action roguelite! You are the lone survivor of your squad, on an alien planet with just your weapon, a jetpack, and the courage to keep fighting. Kill off alien swarms and transform their valuable guts into explosive upgrades and vital utilities.

lone.AI is a space RPG roguelite. With challenging, relentless gameplay, each run has the potential to boost your ship's power, speed, and more. As a lone AI, fight your way through the solar system and uncover the secret behind the ZOSMA, an alien race that holds power over the system.

Control the ball with gravity and smash through endless hordes! Collect weapons and skills, power up to the max, and survive the onslaught!

Survive 10 enemy stages! Shoot 'Em Up style, spaceship game, in pixel art and 8-bit retro music! Evolve your shot to the maximum level, use the energy bar for upgrades, and special abilities! Advance each stage by defeating Bosses and enemies to collect new skills, transformations and extra lives!

Thetawave is a physics-based space shooter with procedurally generated levels, diverse foes, and distinct characters.

Refighter is a lightweight Rogue-like flight shooting and strategy game where players will control spacecraft to engage in battles in space, equipping various bullets and upgrading their levels. Face off against a diverse array of enemies and Bosses.

Spaced Liberation is a very small indie game about the liberation of a planet.

Fight hordes of Covenant & Flood in this new game mixing Roguelite & Bullet Heaven for hours of mindless fun!

This is a retro space shooting game, where you only fight against the strongest enemy. There are 15 unique bosses in the game, and players need to use different weapons and strategies to defeat them. Dedicated to you who are both challengers and retro game lovers.

🩷 It's a Survivor. With horrible princesses and princes. ¡Save them all!. Unlock and upgrade 12 + weapons. Mess up with 40+ runes & find all the cursed objects. Then,  treat yourself with diferent yet disapointing winning scenes. You deserve owning this.

Nanoplanet Survivors is a heart-pounding bullet hell survival game set on a hostile planet. Battle relentless waves of alien foes and adapt with powerful upgrades and unique character abilities. Epic boss fights make every playthrough a thrilling challenge. Can you emerge as the ultimate survivor?

Kill it. Take its gun. Rinse and repeat. WARNING: You will die. A lot. Probably. This 2D Retro shooter is about as hard as it can get, but repetition and good luck will cut though everything like warm cheese. This game grows with the community, and more bosses will challenge you in the future.

Configure the weaponry on your ship to blast away enemies as you navigate through swarms of bullets and space battles. Each ship has unique customization options and playstyles.

Space Survival is the next great SIMPLE 2D casual space action shooter where you have to defend against wave of enemies, have fast reflexes and strong will to win. It is great way to relax, but also a great challenge. How long can you stay focused?

An indie story-driven space shooter with intense battles, escalating enemy waves, and massive boss fights. Choose and upgrade ships, unlock powerful weapons, and protect your allies. Upgrade your base and construct a battleship to take on even stronger enemies. All set to a rock & synth soundtrack.

This is a 2D Pixel Top-Down Space Shooter Game. The game implemented Rogue-Lite elements, like the survivor series.

Consume the civilization of the fools who unleashed you upon the universe. Become the Empire Ender.

Meow Legion is a game about assembling an army of cats to defend against waves of enemies.A top-down roguelite shooter game where you hire cats and level them up to fight mice from the evil Mousy Empire!

STDB! is a rogue-like game about hardcore mercenaries and space marines escaping from a very cozy planet filled with monsters, nuclear fire, viruses and pixelated violence.

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.

Dwarf Star: 16 bit inspired game where mercenary go shoot shoot on evil alien guys who were accidentally fabricated by the government. Top down space shooter with a mission based structure. However, you can do these missions in plenty of different orders with different amounts of upgrades.

The game is set in a dark pixel fantasy world. Destroy hordes of monsters ruling over what once was a prosperous land. 10 levels filled with various enemies await, you, each requiring a different approach to defeat. Like in any RPG, leveling up is the core element of the game

Stellar Space is a new take on a classic arcade game with a modern, rogue-like, form for new players to enjoy!

Alpha Force Zero is an intense top-down bullet-hell adventure that requires skill and planning. Utilize multiple weapon systems including an Auto-Turret with adjustable firing modes and unlock upgrades that you can equip in your ship to give you the upper hand. Dodge, fight, survive!

Pulse laser battles between you and enemies.

A space action-adventure unlike any other: navigate your spacecraft through a galactic-scale mystery. Make sure to loot, craft and upgrade your space fleet. Play the story campaign or test your skills in vicious arena modes against AI opponents.

Explore a vibrant world in this action adventure RPG where you get embroiled in a war between the 7 major races of the rainbow world.

Survive the neon space chaos in this fast-paced top-down arcade shooter with a twist of Asteroids and roguelike. Blast through swarms of enemies, complete quirky quests, and upgrade your ship with absurd weapons in a Jetsons-style galaxy brimming with danger, glow, and humor.

Swarmhunters is a top-down arena action shooter. The war between human and bugs has become worse - Project Swarmhunters emerged at this situation. You play as the best space soldiers in the galaxy and your mission is to strike the hive and hunt down the Emperor, supreme commander of bugs.

Operation Ascension is a Sci-Fi Action Roguelike where endless hordes of enemies charge at you, trying to take your ascendant body. You need to slice through the digital chaos and break free. Unleash your powers. Will you be able to complete the transformation and become an Ascended Being?

Void Of Space is an RPG, horror-survival game, a science fiction adventure. Explore the colonizer ship Genesis IV, abandoned in the atmosphere of an unknown alien planet. Craft items, find weapons and equipment to defend against the hostile life forms you encounter.

Survivor: Spark is the first episode of a series of anti alien invasion games. It's a classic transcendental third person shooting game!