Top similar games like UFO ENEMY KNOWN:

The Galactic Eggpire are taking over the galaxy. Join The Scrambled Alliance and roll, launch and scramble some eggs!

"AfterM.A.T.H. (Mobile Arsenal Tactical Hunter)" is a sci-fi action game where players pilot advanced mechs to combat the deadly Venomarch creatures. Engage in diverse missions including enemy elimination, hive destruction, new weapon testing, and giant boss battles in a post-apocalyptic world.

Dive into the world of "Bullet Race," a low-poly arcade combat car game where wielding powerful weapons is the difference between shadowy evasion and seizing control. Race, combat, and dominate in this adrenaline-fueled thrill ride!

Protect your small off world farm from a variety of oversized and hungry alien bugs. Gain access to a varied assortment of weaponry and equipment designed for high caliber pest control. Bring a friend or two for added firepower.

Space combat sim with physics-based gameplay, personalized AI, in-depth loadouts and customization, and wingman dialogue

Red Faction: Armageddon Path to War includes 4 new missions, 2 unlockable items and 10 new achievements!

A high energy, physics driven shooter where everything can be destroyed and consumed. Fight angry bots to gain size and abilities. Grow from a tiny pebble to a mountain of a force and you just might EAT THE WORLD! Then build and share your own worlds with the sandbox level editor!

A modern tribute to arcade legends! This shoot'em up arcade game revives the classics after 45 years with fresh graphics and innovative gameplay. Become a part of Space Ranges Inc. Join now! Get the high score!

A hardcore, mechanically deranged wave shooter! Shoot robots to your hearts content! Collect items! Upgrade yourself! Deny any meaning whatsoever!

A first person sandbox shooter, where you can fight in either the sky above or on the ground. Customise your plane's arsenal how you want it. Build a loadout tailored to your play style. Razed Earth is a simple yet liberating sandbox experience built to be played by anyone.

A sandbox battle simulator game where you can build your own shape-shifting warbots, program their AI, and watch them smash each other up on the battlefield! Join the battles yourself by taking control of the warbots! Use Steam Workshop to check out warbots created by players from around the world!

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.

Robot Fury is a mech combat simulator where you can feel like a true robot warrior. Fight enemies with a powerful flamethrower, soar into battle with your jetpack, and finish off foes with precise machine gun headshots. Customize your mech and engage in exhilarating, epic battles!

Become a giant dinosaur and flatten entire cities before the City Defenders can stop you! Crumbling City is chaos and fun in a physics based destructible world. Rampage across cities as a colossal dinosaur and leave nothing standing! Nature’s revenge has never been this fun!

Red Faction: Guerrilla re-defines the limits of destruction-based game-play with a huge open-world, fast-paced guerrilla-style combat, and true physics-based destruction.

Set 50 years after the climactic events of the original Red Faction, Red Faction: Guerrilla allows players to take the role of an insurgent fighter with the newly re-established Red Faction movement as they battle for liberation from the oppressive Earth Defense Force.

Fast-paced vehicular shooter. Drive a combat vehicle of your choice, shoot your way through multiple battlefields, fight giant bosses, dodge asteroids and witness cataclysmic events.

Intense, exciting, and visually stimulating arcade spaceflight through dense fields of asteroids, hostile ships, and other obstacles.

Take control of a powerful mech, scavenge for different weapons and upgrades, and complete missions to help the last humans recover from the AI apocalypse in this top-down real-time tactical action-roguelite.

Sun Rush is a third person arcade shooter in which you fight off alien invaders. Use the elements fire, water and oil wisely to kill your enemies effectively.

Lead a powerful space battleship and bring victory to humanity in the midst of an endless war.

Mankind's Last Stand is an epic off-world 3rd-person shooter. Take command of the mighty Decimator, customize and upgrade its weapons to crush alien invaders. Prepare for intense boss fights, stock up on boosters, and reclaim all zones to restore order.

A ragdoll sandbox physics game where you place traps, cause pain, and earn coins for every hit. The more it hurts, the more you get.

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.

Blockstorm is a FPS game set in a world made of destructible blocks. All maps and characters included in the game are made with the same tools that are available to the public. You can build everything in Blockstorm, and you can destroy it.

Cosmik Storm is a fast-paced single player FPS and space shooter with ray-traced graphics. As Earth’s last space marine, fight through asteroid fields and starships with advanced weapons, destructible environments, and physics-driven chaos to stop the robot apocalypse.

On a recently-terraformed planet at the edge of human space, waves of alien invaders have suddenly appeared. Take the pilot's seat of a VTOL fighter aircraft and wipe out the alien infection!

Hot Stuff is a casual action oriented party game, with procedural elements and simple controls, suitable for different types of players to quickly pick up and play together, achieving cooperation within the chaos.

Join "Fizzy Friends," a multiplayer online physics sandbox game. Create dream levels and thrilling battles using an advanced physics engine and various toys. Invite friends to join your battlefield for a unique interactive experience.

Escape Confinement, who cares about your past sins, You have a robot arm!. Nothings going to stop you.

Bring the cities of the world to their knees as a giant Kaiju. Featuring a fully destructible physics-based sandbox for you to lay waste!

Sandboxes is a casual multiplayer sandbox game. Reimaged and recreated from scratch, featuring significantly more powerful building tools and a host of new objects and features to play with, SandBoxes is the ultimate sandbox game.

Lead through the fires of conflict, set traps, maneuver, feign retreats, build sentry turrets, counter-attack and defend the line to protect your facility from evil forces.. Do not relent.

A generic shooter about robots fighting aliens with no deeper meanings. Engage the reptile brain to defeat the typical foes that will appear in normal sizes and standard quantities.

Gentle Club is a fighting simulator inspired by Hollywood movies, distinguished by the choreographed stunts the players perform while fighting in dynamic and destructible environments.