Top similar games like Bill's adventure: Alien war:

Sci-fi 2D shooter platformer combining the control of a human character and an armored vehicle on the surface of a planet filled with robots and immortal local inhabitants

You do not know anything, yet you have to move forward. Wander through the corridors of a mysterious factory and recover your abilities. Fight patroling drones and break through to demanding boss battles. Seek a way out and find the meaning of the game's title.

Beyond Sentinel will have you play as both Justin and Erica in horizontal shooter and metroidvania stages as you battle in space and explore the many levels of the Sentinel station.

You awaken alone aboard a ship. Ahead of you lies an epic mission. Behind you, a forgotten past. Guided by Cosmo, your enigmatic artificial intelligence, you must face the fleets occupying each planet, recover fragments of your past, and uncover the true purpose of your journey.

Super Artificial Intelligence PSIKE is a 2D platformer Action game. The Epic story is about an A.I who want to be a human and a man who does not want A.I . Speedy Action part, cool visual novel part and cinematic cut scene will take you to a future world.

An SNES-Inspired, platforming, sci-fi adventure. It's like playing a Saturday Morning Cartoon!

Speed through a sinister space station to free yourself and fellow aliens from captivity in this 2D fast paced platformer!

In the game you play the Pandean hero, Tin, which has a mission to save his planet from alien threat. You will be facing many obstacles thru different environments, where you will meet angry robots and funny looking animals.

MindSeize is a 2D Metroidvania game set in a Sci-Fi-universe. Transfer your mind to a robot and rescue your beloved one!

Forge your own path through a derelict station in this fast-paced epic adventure. Navigate the labyrinthine behemoth, form alliances with survivors, and uncover the secrets behind the mystery that befell this place.

Flip gravity on the fly, master a multi-stage jetpack, slingshot across massive gaps, and use weapon recoil to launch yourself through chaotic levels. Evolve your arsenal through use, fight aggressive enemies, and turn the environment itself into a weapon in this high-mobility sci-fi adventure.

In a world devastated by machines, humanity places its last hope in a warrior equipped with special armor. Explore intense stages, face challenging bosses, and fight to reclaim what remains of the planet.

"Havoc Runner" is a futuristic action and 2D platform game that will take you to Titan's moon to face killers robots, missile launchers, and automated weapons in a hostile environment where you must find and destroy the Tupan computer, preventing a missile attack on the planets of the solar system.

Blast your way through a world of deadly robots and monstrous machines in this explosive run-and-gun action platformer inspired by '90s classics!

Explore the Echoes of Nox amongst the war between 3 factions of robots. Uncover new tools and take territory as the dynamically changing rooms switch hands between the different AIs and yourself. Reveal the secrets of the past and discover why you alone were left in this station.

I wanted to make a game, so I did. This game is a 2D action game, hope you enjoy it

Zack Y is a 2D Old School Scifi themed platform action game based on the story of the Alien called Zack Y whose mission is to rule over the Earth.

Jump, shoot, dodge and manipulate the world with magnetic forces. Battle robots, navigate deadly traps and solve physics-based puzzles on a fallen space station where an autonomous AI may be humanity's last hope.

Immerse yourself in a pixel-art platformer with a gripping anime-style story! Each level unveils new challenges—dodging obstacles, intense shootouts, thrilling chases, and unexpected alliances. Discover the world step by step and experience a narrative full of twists and excitement!

With the power of gravity manipulation and bubblegum, the Bubblegum Bandit wreaks havoc and takes revenge! Steal from evil robots and blow up their ships!

A Sci-fi Shooter with Pixel-art graphics and various mechanics such as slow motion and dashing. In some levels you also get a special assistant.. You will enjoy this space shooter game. make sure you ALWAYS KILL THEM ALL.

The world belongs to machines now. Join a loyal robot dog on a journey through a haunting post-apocalyptic world in search of its lost human family. THE RUSTED is a hand-drawn 2D action-puzzle platformer.

Build the ultimate space warrior, a Bellator, and equip powerful bionic weapon/armor augments to fight in a 300 year planetary war against the 7 factions of humanity. Reclaim the solar system to reunite The First Kingdom as a Bellator of The King's Guard in the sci-fi Co-op, PvP, PvE world of SUMBR

The Place is an atmospheric science fiction quest inspired by classic works like Aliens, Predator and The X-Files. Immerse yourself in the retro-futuristic aesthetic of the 90s as you travel to Venus to find a weapon against Earth's alien invaders.

In this 2D action platformer, you'll play as a humanoid reptile and save the planet and your people from an evil corporation! Reach the control center and activate the self-destruct mechanism! It won't be easy, as there are plenty of traps, obstacles, and heavily armed guards in your way!

Upgrade your robot, equip powerful weapons and defences and uncover the secret of your existence. Merciless enemies, treacherous traps and tricky jump 'n' run passages await you in this Jump 'n' Run RPG adventure by two passionate indie game developers.

A game designed with the intend of speed running as the player you must fight monsters and robots and make your way through four stages and defeat all the bosses and make it to the end portal as quickly as possible

Far Star is a story-driven action-adventure game with Metroidvania influences. There is something fishy going on in this galaxy, but this won’t stop your intergalactic general services crew from doing their job using a varied set of skills, weapons and outfits.

Capsized is a fast paced 2D platformer focused on intense action and exploration. As a intrepid space traveler, your ship has crash landed on a mysterious alien planet. You must navigate through the perilous environment and fight off blood-thirsty creatures to save your crewmates and escape with your lives!

Quarked Up Omnibus is a 2D space exploration adventure game where you can walk around planets, and seamlessly fly to numerous other planets. Clean, Fix, and Exterminate your way through a day-by-day story, and plot your escape.

Jett Rider is an arcade shooter packed with action, exploration, RPG elements, tons of humor and awesome bosses. Explore, fight, gain experience, purchase weapons in this exciting adventure.

So you know that one rover that landed on Mars? Yeah this isn't that.

Fight against rebel robots together with your friends and save planets from invasion....

Stranded on a futuristic Earth, you and your alien pals need cash to get home! Explore a vibrant 2.5D world, go on taxi missions or assist humans and UFOs alike in this casual platformer. Can you hustle your way to a stellar escape?

Outpost Delta is a single player, 2-D side-scrolling sci-fi shooter for PC. Take on the role of Delta, the outpost’s emergency defense, who along with her AI companion must defend the space station against alien intruders.