Screenshots
Watch trailer on Steam ↗O3: Hollow Descent
Ta2 Games · Published by Ta2 Games · Official site ↗
Last updated 27 Sept 2026
O3: Hollow Descent is a top-down roguelike shooter featuring fast bullet-hell combat, procedurally generated rooms, and randomized builds set in a dark sci-fi world.
Action, Adventure, Indie · More free games
Explore a dark and dangerous world in O3: Hollow Descent, an action-packed indie game that combines roguelike combat with top-down exploration. Navigate through procedurally generated rooms, facing new challenges at every turn.
About this game
O3: Hollow Descent is a fast-paced top-down rogue-like shooter set in a dark, biomechanical sci-fi world.
You play as a lone astronaut descending into a hostile alien planet, fighting room by room through shifting labyrinths filled with traps, creatures, and escalating threats. Combat is precise and dodge-focused, built around quick dashes, reactive shooting, and randomized weapons that reshape your build every run.
Each descent is different.
Each death is part of the loop.
Push deeper. Learn faster. Return stronger.
Inspired by the haunting atmosphere of H. R. Giger and Zdzisław Beksiński, O3 blends oppressive sci-fi environments with tight, skill-driven combat.
Procedurally generated rooms reshape every run.
Navigate arena-style encounters, avoid deadly traps, and adapt to new layouts as you descend.
Engage in intense bullet-hell combat using fast dashes and responsive shooting.
Master enemy patterns and clear each room to progress.
Discover powerful weapons and a range of active and passive abilities that shape your build each run.
Break into hidden rooms, open secret chests, and uncover rewards hidden beyond the obvious path.
System Requirements
Will my PC run this? →Minimum
- OS: Windows 10
- Processor: Requires a 64-bit processor and operating system
- Graphics: NVIDIA Geforce or AMD equivalent
Recommended
- OS: Windows 10
- Processor: Requires a 64-bit processor and operating system
- Graphics: NVIDIA Geforce or AMD equivalent
Supported Languages
*languages with full audio support
Latest news
AnnouncementsOfficial
🎉 O3: Hollow Descent is NOW LIVE on Kickstarter! 🚀
Hey everyone 🖤The moment is here… After all this time working on the game and preparing the campaign, O3: Hollow Descent is now live on Kickstarter.This is a huge step for me as a solo developer, and it will directly support the final stage of development.🔥 Campaign statusWe’re already at 11% funded, and moving forward step by step💡 If you’d like to support• Back the project on Kickstarter • Wishlist the game on Steam • Share it with friends or communities • Talk about it anywhere you canEvery action pushes the project forward🙏 Thank youSeriously… thank you for being here and following the project It means a lot to me🖤👉 Kickstarter link: https://www.kickstarter.com/projects/ta2gamesstudio/03-a-surreal-roguelike-journey-into-the-unknown?ref=project_buildRead full article on Community Announcements (Ta2 Games)AnnouncementsOfficial
O3: Hollow Descent Kickstarter goes live April 7
Hey everyone 🖤Just a quick heads-up.The Kickstarter campaign for O3: Hollow Descent goes live on April 7 at 18:00 CET.If you’ve been enjoying the progress of the game and want to help support its development, this will be the moment to do it.I’m building this project as a solo developer, and the campaign is there to help me bring in the final pieces needed to push the game further.There will be limited early rewards available at launch, so if you’re planning to support, being there early will help.Thank you again for being here and following the project. Really appreciate it.I’ll post the Kickstarter link here the moment it goes live.SimyRead full article on Community Announcements (Ta2 Games)Community & EventsOfficial
O3: Hollow Descent - Steam Next Fest Demo Gameplay
Watching a full demo run of O3: Hollow Descent during Steam Next Fest.If you enjoy what you see, consider wishlisting, it helps a ton as a solo developer.Read full article on Community Announcements (Ta2 Games)Community & EventsOfficial
O3: Hollow Descent - Steam Next Fest Demo Gameplay
Watching a full demo run of O3: Hollow Descent during Steam Next Fest.If you enjoy what you see, consider wishlisting, it helps a ton as a solo developer.Read full article on Community Announcements (Ta2 Games)AnnouncementsOfficial
Steam Deck Support - O3: Hollow Descent
Hey Explorers,The demo of O3: Hollow Descent has been fully tested on Steam Deck and is playable from start to finish.Here’s what you can expect:• Full controller support (no mouse & keyboard required)• Steam Deck button glyphs• Native 1280×800 resolution (default)• Stable 55–60 FPS during gameplay• UI optimized for handheld readabilityAs a Steam Deck player myself, I’ve been testing the demo directly on Steam Deck to make sure it feels right in handheld mode.Official verification is still pending, but based on my testing, performance and controls are solid and fully playable.If you’re playing on Deck, I’d really appreciate your feedback.SimyRead full article on Community Announcements (Ta2 Games)
