Top similar games like Alien on the Radar:

Slimestoppers is a top down horde shooter that pits the technology of man against a relentless army of sentient slimes from space. Choose from an ever-expanding arsenal of weapons, abilities, perks, and equipment to forge the perfect Slimestopper. Supports multiplayer up to 4 players!

Engage in an intense space shooter that you can play in single-player or multiplayer with up to 6 players. Play a variety of different spaceships, each with their own unique stats, components, and playstyles!

Warix is a fast-paced 1v1 territory capture fighting game set in a dark, microscopic world. Control a glowing cybernetic nanobot, draw trails to claim turf, and destroy your rival in high-speed combat. Parry bullets, steal boost, and outsmart players online or battle a relentless solo AI.

A fast-paced, 2D Arena Shooter, based on the upcoming game 'Project Onyx'

Are you ready to command a range of different units as they battle aliens in a mission-based take on the classic Snake? Select your path to victory!

A top down, twin stick shooter inspired by classic retro arcade games with loads of enemies, fast paced bullet hell combat, big boss battles and tons of bullets.

A fast-paced side-scrolling shooter about primates getting access to weaponry way above their paygrade.

Brace yourself for explosive space battles in GalaxIverse II! This intense multi-directional shooter puts you in the pilot's seat against alien fleets and colossal capital ships.

Frantic 4-player laser ricocheting top-down shooter. Keep it casual and enjoy the chaos, or master the surprisingly deep mechanics to obliterate your enemies. Duke it out locally in free-for-all or 2v2.

Face the varied challenges of the Machine God Zir in ARENA, a standalone expansion for Synthetik: Legion Rising! Leverage the next level in gun-play and experiment with powerful tech in varied action packed Arenas!

The Squids are here - but your soldiers are ready. Grow your squad up to 4 members by rescuing survivors. Obtain the best weapons, support, and equipment you can by gathering Squid Samples. Become a force to be reckoned with, one the Squids will fear for generations to come.

Survey planets. Obliterate the locals. Invest in your ship. An action packed rougelite where the engineering crew you hire is either your greatest asset or your worst enemy, regardless of if you want them to or not. Designed as a single-player experience but with a fun, arcadey multiplayer mode.

1–4 player co-op survival where you fight through waves of enemies, rack up kills, and collect powerful pickups to stay alive as long as possible. Fast-paced, chaotic runs push your limits every time.

Couch co-op game for 1 to 4 players. Offline multiplayer and single player. Battle solo or in groups, clear levels. Eliminate all foes on stage to advance. Treasure chests give you new power-ups: speed, power, pass through walls, etc.

Play Evolve for free with Evolve Stage 2! Evolve Stage 2 is a next-generation free multiplayer shooter featuring addictive 4v1 gameplay. One player-controlled monster must evade and outsmart a team of four uniquely skilled hunters.

Magnetar is a top-down space shooter set in a unique physics-based environment packed with opportunities and hazards where you'll need all your skill to survive. Collect credits to upgrade ships and allies. Features 50 campaign levels and endless random levels.

Fast Finger Rule is a minimalistic battle planet duel simulator. To make precise shots you just need to click on your planet at right time. Game has 10+ planet shield types and 15+ planets of 3 different tiers.

Cosmotrons is a cosmic battleground where skill and strategy collide. Choose your ship and customize its weaponry, engage in epic dogfights, navigate treacherous environments and outmaneuver your opponents in intense, fast-paced multiplayer battles. Are you ready to become a true space ace?

Survive as long as you can in an endless bullet hell with randomized stats and weapons.

Dive into a top-down shooter where you’ll battle relentless waves of zombies, either solo or with friends! Face off against formidable bosses, unlock upgrades through a tech tree, and enjoy a casual gaming experience crafted with passion by an indie developer.

Retro-inspired arcade-style shooter. Save humanity from incoming waves of flaming hot meteors, alien ships hell-bent on destroying humanity, and the strangeness of space by shooting, blasting and nuking incoming waves of meteors and enemies.

Vangrid is a top-down tactical shooter for solo play or co-op with friends online. Storm strongholds, hold points, escort convoys, or retake outposts. Use firepower, drivable vehicles, and backpack skills (heal, build, repair) against smart AI squads and towering bosses in ever-changing maps.

Vertical Fighters is a top-down shooter with a tactical Rock-Paper-Scissors twist! Enjoy playing as dozens of units across 4 unique classes that hard-counter each other. Experience desperate cooperation and fiendish treachery. Customise your loadouts, camos and pilots for maximum skill expression!

Xeno Crisis is an arena shooter in which up to two players take control of battle-hardened marines embarking on a deadly mission to confront an alien menace! Run and gun your way through thousands of adversaries, searching for survivors, and ultimately facing the origin of the outpost's demise.

In this arcade-style top-down shooter, originally released in 1988 for the Commodore Amiga, take on the role of members of a 4-man squad fighting through a treacherous jungle environment. Play with up to 4 player local co-op.

Droned is a small project by a single dev to revive some old school action. Compete in AI league, take on the trials or battle it out in arena with your friends.

A top-down space-combat epic. Fifty warships, fleet actions with two hundred ships on the field, and a civil war in its seventeenth year. Fly for Earth’s church-state or the Martian forge that armed it — solo, split-screen co-op, or 24-pilot online attrition battles.

Gem Raider 2 is an old-school move-and-shoot game. Your objective in each room is to destroy all of the Power Gems and return to the teleport pad to exit. Other Gems can also be destroyed to increase your score. There are 20 rooms and each of the 9 types of enemy Gems has unique weapons or skills.

The Last Color is a co-op survival game where every wave introduces a new enemy color, while the number and variety of enemies continue to grow. Collect coins, increase your team’s shared level, and choose 1 of 3 upgrade cards as you fight to reach the final color on wave 16,777,216.

A fast-paced arena shooter where you wield two weapons at once across unique battlegrounds. Each round is different: new map, teams, weapons, and modifiers.

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.

Synthetic Paradox is a sci-fi action rogue-lite mixed with tower defense elements. Fight never-ending waves of enemies and bosses, collect items and build up your defenses alone or in co-op for up to 4 players! Discover unique combinations of towers and items to help you protect your Core!

Tankle is an amazing action packed multiplayer or singleplayer top down shooter, you have to dodge bullets and defeat enemies to progress and grow stronger!

RZR is a 3rd person singleplayer/multiplayer shooter. Collect unique items in the campaign and maximize your efficiency against hordes of zombies. Compete with other players in deathmatch and reach the top of the leaderboard. Play survival mode with your team and prove that your team is the best.