Games like IS Defense on Steam
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Angry Video Game Nerd II: ASSimilation
When a mysterious beam from space transforms the world into a game, the Angry Video Game Nerd must return to put the "ASS" in ASSimilation. Utilize new mechanics, power-ups, abilities, and collectible armor pieces to defeat your most powerful foe yet, and save the world!
Super Cyborg
Super Cyborg is an old school non-stop hardcore run'n'gun action game! You are an elite battle cyborg who is sent in to investigate a series of anomalies on a mysterious island. The merciless alien known as the 'Xirxul life form' has been awakened by unwitting scientists and now: all humanity is in danger!
WIN THE GAME: DO IT!
WIN THE GAME: DO IT! - is a hardcore game. Try to finish the game without spending your nerves.
Strike Suit Infinity
Ok, cadet. This is it. All your training has brought you to this point - you are here for one reason only: to be the best.Strike Suit Infinity is a frantic high score chaser where your skill is the only thing that matters. Whatever combat experience you have had so far is considered irrelevant.
Operation Thunderstorm
The year is 1942. The British government decides to launch one of the most risky operations of World War II. The targets are the most important figures of the Third Reich. After several months of research, MI6 chose three people: the chances of eliminating them are slim to nothing.
Intrusion 2
"This is some of the most fun I've had with a game so far this year, and it will go down as one of the best side-scrolling shooters of all time." - 9/10, Destructoid
Masked Forces
Masked Forces is an action-packed game where your main purpose is to eliminate your enemies using any means necessary. You have a great singleplayer campaign and multiple online game modes that you can use to show your might.
You have a drunk friend
What will you play if you have a very drunk friend? A warm hearted angel? Or an evilbad guy？You may find answer in this fun weird game. Try exploring in the room and figure out how to sober up your friend, may it's not only just one solution,though,never hurt friend,and never do evil!
Mouse (Sneaking)
In this runner game, you play as a mouse who has stolen cheese as much as you can.
Kings of Kung Fu
Inspired by classic Kung Fu films, this passion fueled fighter provides fun 1 vs. 1 gameplay for gamers of all skill levels. Take on the role of one of 14 martial arts stunt masters as you fight to show your style cannot be beat. Fight it out in the Single Player Arcade Mode or Local Two Player VS. Matches.
Skirmish Line
Experience the brutality and randomness of war as an Allied tactical commander in the Pacific Theater during World War 2. Train, equip, and command a squad of soldiers as you fight against the fanatical Imperial Japanese Empire.
Total Lockdown
Total Lockdown is a battle royale on the top floors of a giant skyscraper. In this action shooter, the goal is to survive using any available weapons, gadgets, and tricks. Fight for fortune and fame in a battle to the death!
Burnin' Rubber 5 HD
Burnin' Rubber 5 HD is a remastered update of one of the most played action games on the web. Unlock over 30 challenges, 50 cars and multiple explosive weapons. Master 3 different challenge modes and hone your skills to take on the biggest end boss ever.
Nefarious
Play as the villain in Nefarious! An action platformer where you globe hop between several kingdoms kidnapping princesses who alter gameplay in unique ways. Then thwart various heroes in reverse boss fights, recreated iconic battles where you control the boss.
Sky Noon
Sky Noon is a First-Person Shooter with Brawler mechanics. Players are equipped with a grappling hook, a lasso and an arsenal of weapons and abilities. There is no health in Sky Noon - players eliminate their enemies by pushing and pulling them off the Floating Frontier.
Iron Grip: Warlord
Iron Grip: Warlord invigorates tower defense with first-person shooter elements to give a new twist to the genre.It puts you in the heat of the battle, fighting off hordes of AI-controlled invaders. Play alone or with friends, in a diverse and challenging struggle to save all of Atelia.
Valfaris: Mecha Therion
Therion returns as the hunt for Lord Vroll continues. Pilot an advanced machine of death and destruction in this explosive 2.5D side-scrolling shoot ‘em up, and sequel to the critically acclaimed Valfaris. Strap in and unleash mecha hell!
STRAFE: Gold Edition
STRAFE® is the worlds bloodiest roguelike first-person shooter! Featuring mind melting secrets and persistent gore that allows you to paint levels red with the excessive entrails of your enemies. 30+ weapons, 20+ enemies, & a red hot soundtrack.
Penguins Arena: Sedna's World
Penguins Arena is a thrilling and innovative First Penguin Shooter with quick, hectic rounds and where the magic of reincarnation, combined with the supernatural ability to return to the game as a ghost, ensures that your character has every chance to change your tribe's fate, even in the afterlife.
Heroine of the Sniper
A light-hearted FPS. Jam-packed with 15 missions, each with a different theme. Take out various targets, everything from trains, cars, to bombs and helicopters. Everything EXCEPT people!
Super Trench Attack!
Super Trench Attack™ is a goofball comedy twitch-shooter based in a World War setting.
Really Big Sky
A super fast, twin analogue shooter for the modern age!
Touhou Crisis
Classic arcade nostalgia and modern-indie design collide in this shooting-gallery boss battler! Play as a one-man army in offline solo OR bring a friend in online co-op/versus mode! Supports Mouse AND Lightgun play!
Project Nightmares Case 36: Henrietta Kedward
Project Nightmares is a survival horror game with a procedural structure, creating unique scares every time you play. A machine will induce you into a dream state, throwing you into a living nightmare firsthand in order to discover the story of Henrietta Kedward, an old woman with a dark past.
Chicken Invaders 4
They came without warning, squawking menacingly, their ruffled feathers darkening the sun. Invading intergalactic chickens, out to punish humanity for our oppression of their earthly brethren. Now they're back, and they're having Earth for dinner!
Gunscape
Gunscape provides easy-to-use tools based on a block-placement interface everybody's already familiar with to create all types of maps. Don't like building stuff? Then just blast your way through hordes of monsters or duel with other players!
Oblivity - Find your perfect Sensitivity
Oblivity is an advanced aim training software that provides everything you need to improve your aim! Find your perfect, intuitive mouse sensitivity with Oblivity's sensitivity finder. Or detect your bad aiming habits in the extensive analysis and replay space.
Vomitoreum
Vomitoreum is an FPS Metroidvania with a focus on atmosphere and horror, inspired by the paintings of Zdzisław Beksiński.
Battle Grounds III
After 6 years of development, Battle Grounds III (BG3) is the next iteration in the classic franchise which began 17 years ago. Prepare for battle in the American War of Independence!
Platformines
Platformines is a unique 2D platformer packed with exploration, RPG and shooter elements, set in a vast 16-bit underground world! Customise your character, master all difficulty levels and literally jump to the top of the leaderboards to prove your skills!
Commander Cool 2
Commander Cool 2 is a four player local coop retro-styled adventure that is destined to be one of coolest game in 2015!
Putin VS ISIS
You play for Vladimir Vladimirovich Putin, and you need to save Syria from terrorists, for this you must fly and drop bombs on the terrorists.
TO THE TOP
VR Platforming Game, that gives you the freedom to move across the environment with superhuman abilities. Conquer over 35 levels with new obstacles and challenges. Compete for the fastest times or explore the environment. Experience the freedom of movement.
Shaolin vs Wutang
Shaolin vs Wutang is a INDIE love letter to Martial Arts and classic Kung Fu films. Made for casual game fans not intended for Hardcore Fighting Game players.