Store
Update record for September 10
・Your data is automatically saved when switching maps. ・If you pick up items and it exceeds the limit of the number you have, they are sent to the item box.
Steam
ONENELLEMOO
Also known as ONENELLEMOO, o, onenellemoo
This is an action-adventure game that requires you to use your brain. Save the world with your powers of observation and inspiration!
Last update
1 Jun 2026
Players now
0
Original sources
1
Latest update
Latest updates
Update history
Browse past updates and patch notes for this game.
- June 2023
- Steam Next Fest BroadcastThis is an action-adventure game that requires you to use your brain. Save the world with your powers of observation and inspiration! In this broadcast, a pre-recorded play video is played repeatedly. You can see the st…
- Steam Next Fest BroadcastIn this broadcast, a pre-recorded play video is played repeatedly. You can see the story up to the point where the protagonist defeats the first boss. Feel free to ask if you have any questions. I am Japanese. I don't s…
- March 2023
- The playtest of ONENELLEMOO is underway. I would be very happy if you could write your impressions of playing this game on the online bulletin board. It would be very helpful if you could write how you felt about the di…Patch notes
Gallery
In-game media
Achievements
Community progression
Top picks from 6 Steam achievements, sorted by player unlock rates.
- OnosshinDefeat Onosshin48.3%
- PrinceDefeat Prince37.0%
- QueenDefeat King and Queen29.0%
- BrabadowDefeat Brabadow17.7%
- Chapter 1 100％Completely clear Chapter 112.9%
- BloomamHidden12.9%