
Underworld
About the Game
Underworld is a 2D pixel-art action-adventure platformer set in a haunting sci-fi realm deep beneath the surface. You play as a nano-enhanced swordsman, awakened by a mysterious AI after being left for dead in the ruins of a forgotten world. With your body rebuilt and your mind linked to advanced technology, you're the last hope to stop the growing corruption spreading through the depths. Explore a nonlinear world filled with dangerous creatures, hidden secrets, and lost souls. Every step forward requires precision, courage, and a sharp blade. Inspired by Metroidvania exploration and Souls-like combat, Underworld challenges you to think, adapt, and survive in a beautifully decayed futuristic landscape.
If you have any thoughts while playing, feel free to leave a comment, weโd love to hear from you. And if you enjoyed the game, a positive review goes a long way. It helps us a lot.
Features
Precision Combat โ Engage in intense melee battles where timing, spacing, and stamina management are key to survival.
Sci-Fi Metroidvania World โ Unlock new paths with abilities, upgrades and components as you traverse a sprawling underworld network.
AI-Guided Narrative โ Discover a dark, layered story through your AI companion (VIS) as you uncover the truth of who you are and what you've become.
Pixel Art Atmosphere โ Explore a visually striking 2D world with hand-crafted environments, dynamic lighting, and eerie sci-fi vibes.
Souls & Upgrades โ Absorb fallen souls to enhance and customize your abilities, unlock skills.
Singleplayer Experience โ No distractions, no hand-holding—just you, your sword, and the horrors of the underworld.
โจ๏ธ Controls
| Category | Action | Key / Input |
|---|---|---|
| Movement | Move Left / Right | A / D |
| Jump | Space | |
| Dash | C | |
| Combat | Attack | V |
| Abilities | Dark Dash | 2 |
| Reaper Attack | 3 | |
| Glitch Attack | F | |
| Interaction | Interact | E |
| Travel | Enter | |
| Items | Use Potion | 1 |
| System | Menu | Esc |
| Mouse | Primary / Next | Left Click |
| Scroll Up / Down | Mouse Wheel |
You can play from browser : just make sure you have Hardware Accelerated turned on in your Setting -> System on Chrome.
© 2026 Nitrous Studio — All rights reserved
| Updated | 10 days ago |
| Status | Released |
| Platforms | HTML5 |
| Release date | 61 days ago |
| Authors | Nitrous Studio, TheKaiser-design |
| Genre | Platformer, Adventure |
| Made with | Unity |
| Tags | 2D, Metroidvania, Pixel Art, Souls-like |
| Average session | About an hour |
| Languages | English |
| Inputs | Keyboard, Mouse |
| Links | Blog |
Development log
- Another Update51 days ago
- Big Update52 days ago
- Welcome to the Underworld !60 days ago




Comments
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GREAT WORK! LOVE THE STORY LINE COMIC BOOK OPENING, THE GAME TOOK ME BACK TO 2000'S NOSTALGIC TRIP!! KEEP UP THE WORK
Thanks!! I`m glad you liked it :D
obsessed, this is one of those games you get lost in for hours!
Thanks for the feedback!!
Voy a darle una oportunidad, es interesante.
Thank you, I hope you give it a try!
This is for sure a great game! i enjoyed playing a lot. The graphic is great and the use of a comic book opening is original. However i do have some feedback if you don't mind.
Besides this, fantastic work!
Thank you for your comment and your kind words! The feedback is really appreciated, we'll keep it in mind.