Ex Vitro

Ex Vitro

Evolver Dynamics · 2024 · Exploration, Metroidvania, 2D Platformer, PvE, Platformer

PC
1 user reviews100% · 1
This game is free to play. Get it on Steam →

Screenshots

About Ex Vitro



FEATURES:


  • A retro love letter to the Metroid series, with a few quality of life adjustments, such as teleporters, rechargeable ammo, item collection tracking by area, and more
  • Discover journal entries hidden throughout the facility, explaining the grim fate of humanity and its war against the galaxy
  • Uncover the nature of the main character and their role in the conflict
  • Collect and upgrade powerful weapons
  • Traverse 8 different biomes, each with their own inhabitants, secrets, and traps
  • Fight multiple massive boss enemies
  • Unlock 2 endings based on item completion
  • Original music tracks by Sam Bionn


STORY:



By the end of the twenty-second century, Earth was a dry, arid husk. Billions of humans were crowded into overpopulated shelters, rife with disease and death. Just as their ancestors did so long ago, humanity looked to the stars for salvation. Using incredible technologies designed out of desperation, billions of people forged journeys into the darkness, establishing vast networks of interstellar colonies. The discovery of countless forms of alien life was met with indifference - an indifference that quickly turned to contempt. A powerful human military, honed by centuries of warfare, overpowered and conquered isolated alien worlds, claiming them as new territory for the massive human diaspora.

Humanity had avoided extinction and resettled itself, but had made a galaxy of enemies in the process. Survivors of countless fallen alien worlds banded together, and launched a suicidal campaign of revenge against the upstart race. All of humanity’s military and technological advances crumbled under the fury of an enraged galaxy, and soon, only a few million people remained, hidden in isolated pockets across the stars.

Once again faced with extinction, humanity turned to the tool that had brought them to the stars: innovation. But now, surviving military leaders were uninterested in saving lives or defending worlds. Their focus was far more singular - the eradication of everything. Terrible, reality-warping weapons were created by bending the very laws of nature. Captured alien species were spliced together and twisted into genetic abominations. Artificial intelligences were designed and built to brutalize their enemies, stripped of any ethical or moral restraint.

But there were a few dissenters. Not everyone believed that humanity’s last acts should be dedicated to nihilism. Some tried to reason with those in charge. Some refused their orders.

And a small number decided to act.


DEVELOPER’S NOTE:



Ex Vitro began its development many years ago as a tribute to one of the greatest games of all time: Super Metroid. I quickly realized any fangame would be squashed with legal trouble, so I shifted the graphics to my own design and tried to ride the line between ‘tribute’ and ‘knock-off’. It remains to be seen how successful I was, but as a solo developer, I learned a lot about game design in the process. It was the first game I started making, and it contains all of the lessons I learned along the way. Due to its origin, I feel that it’s unfair to charge for it. But I’ve included a bonus pack to go with it, if you want to support future development of new games by me!

BONUS PACK INCLUDES:


  • Instructions on how to build your very own Terrarium! (with special tips from the Facility Administration on how to care for genetic abominations)
  • 3 original music tracks by Sam Bionn
  • High res concept art images of the character, final boss, and ending slides
  • High quality wallpapers with various resolutions
  • Royalty-free sprite sheets of unused graphics that never made it into the game, and behind-the-scenes descriptions of why they weren’t included
  • 8 Royalty-free tilesets of every environment from the game

DLC & expansions

What Steam players say

Recent verbatim reviews from Steam — separate from playze.io community reviews below.

Recommended Jun 28, 2026
A love letter to Super Metroid with smooth gameplay, addictive exploration, and beautiful visuals, all for the beautiful price of free. This is a great game made by a single person (I think, I heard) that absolutely is worth your download.
Recommended Jun 14, 2026
This is one of the best metroidvania games I have ever played and it is such a tragedy that it isn't more popular I have never really been a part of or played the metroid series games much but I do remember the power ups like the [spoiler] infinite jump (gravity repulsor) [/spoiler] power up is a direct reference to metroid and I love it I have one issue though in the final cutscene of the game there is a sequence before it but I accidentally left the room during that sequence and now the game is unbeatable for me I literally cannot initiate it again and I'm soft locked and cant beat the game any more other than a few bugs and inconveniences this is an amazing fabulous fantastic game and definitely worth checking out since I cant afford games I didn't buy the additional art but I would encourage the more fortunate to do so and support this creator with their passion project. I have been with this game since like I think the 1.0 or 1.1 stage and I only recently remembered it and fully 100% the game and finished it (kind of but you already know why)
Recommended May 28, 2026
Short Metroidvania that can be beaten in under 2 hours. Great design and soundtrack, along with a nice story with awesome pieces of lore found along the way.
Recommended May 5, 2026
This is a relatively short and fun metroid style game. I managed to finish in 2 hours. And I was honestly surprised that they went from their first game, being an educational game, to a metroidvania. And nailed the core gameplay loop as well. If they made a sequel and charged money for it I would buy it.
Recommended Apr 30, 2026
i can't believe this is free i would pay money for this.
Recommended Apr 2, 2026
Amazing game that nails the oppressive atmosphere of the first 2 Metroid

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