
Screenshots

Watch trailer on Steam ↗REDNEG ALLSTARS SWING-BY EDITION
あうとさいど · Published by あうとさいど · Official site ↗
Content notice: Contains elements associated with drug abuse.
Very Positive — 100% positive (90 reviews) · 30 achievements
Last updated 27 Sept 2026
Cosmo Dreamer Like Dreamer "Outside" is a fantastical and comical boss-rush bullet-hell shooting game remade from a free game. Both beginners and experts can enjoy the intense boss rush.
£9.29
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Price history
Action · 2024 · More £5 - £15 games
Experience intense boss rushes and fantastical comicality in REDNEG ALLSTARS SWING-BY EDITION. Developed by あうとさいど, this 2024 action game offers both beginners and experts an engaging challenge.
About this game

Cosmo Dreamer and Like Dreamer's "Outside" sends you a fantastic and comical boss-rush bullet-rush shooting game.
This game is a free game "REDNEG ALLSTARS" with a new visual look, It has come to Steam with a swing-by acceleration.
You will enjoy a series of intense battles with unique boss characters.
Bulletstorm type games have an image of being difficult to play, but don't worry.
The game is designed for beginners, while advanced players can enjoy more active play.

Science, magic, and various races coexist,
and various species coexist, sometimes bickering, sometimes seeking each other out.
"REDNEG"
Many large-scale wars have passed,
The planet is now showing an average level of calmness.
The REDNEG's leader, "Bell Nibiru", has taken over the planet.
The idea was to make the barrage warfare, once reserved for wars, into a competition.
To achieve peaceful and intense fighting,
She was a believer in science and opened up the field of computer-simulated
She unveiled a computer-simulated barrage.
"The battle to hurt and rob is here to die!
You who hunger for struggle! From now on, in this virtual world
Let us compete with each other in a pure and righteous manner!"
The name of the simulation program is "Bullet Bell Game".
It was the very battlefield reproduced in the sea of electrons.

・More than 30 bosses attack one after another.
Find out the strategies of the bosses with various characteristics!
・Various player characters with unique personalities.
The number of player types increases as you play the game.
The characters you can choose as players also appear as bosses.
・Magic Gauge" system for beginners
Magic Gauge is a gauge that protects you from enemy bullets.
The Magic Gauge can be used as a shield to protect against enemy bullets or as a bomb to unleash powerful attacks!
・RANK system that changes the difficulty level in real time according to your skill.
・A full practice mode that allows players to carefully study all bosses.
・There are also extra modes such as "endless"...until you run out of power with a randomly appearing boss!
・When you fulfill the conditions, you can add illustrations to the gallery and earn achievements.
Will you be able to collect them all?
System Requirements
Will my PC run this? →Minimum
- Requires a 64-bit processor and operating system
- OS: Windows10
- Processor: Intel(R) Core(TM) i5-4210M CPU
- Memory: 2 GB RAM
- Graphics: Intel(R) HD Graphics 4300
- Storage: 1 GB available space
- Sound Card: Realtek(R)Audio
Recommended
- Requires a 64-bit processor and operating system
Supported Languages
Latest news
Patch NotesOfficial
“REDNEG ALLSTARS SWING-BY EDITION” Ver1.21 Update
Thank you for playing REDNEG ALLSTARS SWING-BY EDITION. We are pleased to announce the Ver1.21 update for the game. In this version, the following changes have been made: ・Adjusted the replay and ranking UI when using the Chinese language setting.Read full article on Community Announcements (外の人・あうとさいど)Patch NotesOfficial
“REDNEG ALLSTARS SWING-BY EDITION” Ver1.20 Update
Thank you for playing REDNEG ALLSTARS SWING-BY EDITION. We are pleased to announce the Ver1.20 update for the game. In this version, the following changes have been made: ・Added support for Simplified and Traditional Chinese. ・Fixed some English text. ・Fixed some UI display issues.Read full article on Community Announcements (外の人・あうとさいど)AnnouncementsOfficial
New "Fox Flare Night" Demo Release
Thank you for your support of REDNEG ALLSTARS SWING-BY EDITION.We at Outside are excited to announce the release of the demo version of our new STG, Fox Flare Night!Store Page HereThis is Outside’s first side-view shooting game, offering a refreshing, fast-paced experience with a lighthearted and comical style.If you’re interested, please consider adding it to your wishlist!Read full article on Community Announcements (外の人・あうとさいど)Patch NotesOfficial
REDNEG ALLSTARS SWING-BY EDITION Ver1.11 update
Thank you for playing REDNEG ALLSTARS SWING-BY EDITION. We are pleased to announce the Ver. 1.11 update of this game. The following changes have been made in this version. ・Changed the behavior of bosses in Practice Mode. Random movement of bosses in BOSS RUSH and ANOTHER DREAMER that may occur due to game progression timing will be randomized. With this version change, some replays saved in Practice mode will no longer be reproduced.Read full article on Community Announcements (外の人・あうとさいど)Patch NotesOfficial
REDNEG ALLSTARS SWING-BY EDITION Ver1.10 update
Thank you for playing REDNEG ALLSTARS SWING-BY EDITION. We are pleased to announce the Ver. 1.10 update of this game. The following changes have been made in this version. Each English expression has been completely updated.Read full article on Community Announcements (外の人・あうとさいど)






