《Features》This is side scroll type shmup.

When you get a capsule item on playing, a gauge displayed lower will turn light.
At this time you hit powerup button, you can powerup.


There are 3 route. If you complete a route, a new difficulty route will be unlocked. 3 crass difficulty are prepared. You can select 3 type fighter at first, you will able to select more fighters by piling up and paying credits.


《How to play》
Game pad, keyboard, mouse are available.
(Game pad is recommendation)
You can customize key or button settings in config menu.

Game pad (XBox controller)
Left stick , D-pad : movement of player and menu cursor
A button : Submit / Fire
B button : Special function/ Cancel
X button : Powerup
Back button : Pause

左スティック : 
十字キー : キャラクターの移動、カーソルの移動など。
Aボタン : 決定 / 攻撃
Bボタン : スペシャル /  キャンセル
Xボタン : パワーアップ 
Backボタン : ポーズ

Left button : Submit, movement of player with firing and menu cursor.
Light button : Cancel, powerup.
Center button : Special function.
左ボタン: 決定、押しっぱなしでプレイヤー移動。
右ボタン : パワーアップ、キャンセル。
中央ボタン : スペシャル機能。

Arrow keys : Player and cursor movement.
Z : Powerup
X : Submit / Fire
C : Cancel / Special function
Tab : Pause

方向キー : プレイヤー、カーソルの移動
Zキー : パワーアップ 
Xキー : 決定 / 攻撃
Cキー : スペシャル /  キャンセル
Tabキー : ポーズ

《Using resources》
In making this game, I used free resources as below.
Sound effect
ザ・マッチメイカァズ (OSA様)

《Update history》
2021/ 1/10   1.05 release
2020/12/30  1.04 release 
2020/12/23  1.03 release

Updated 9 days ago
Published 28 days ago
PlatformsWindows, HTML5
Made withUnity, Blender, Aseprite, GIMP
Tags2D, Shoot 'Em Up, stg, Unity
Average sessionAbout a half-hour
LanguagesEnglish, Japanese
InputsKeyboard, Mouse, Gamepad (any)

Install instructions

Extract from downloaded file, and open file named "SPOLOUS.exe".


201231_SPOLOUS_v104.zip 60 MB
210109_SPOLOUS_v105.zip 60 MB

Development log


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(1 edit) (+2)

All I can say that it is a very commendable game that pays tribute to Gradius with a few little unique points, such as options being required to upgrade twice for later unlock-able types compared to easy upgradable missiles and main shots for the first three types. Additionally, it's great that each type has a special button to play around with Option formation, which is expanded from Gradius V. While I do wish those games that involve the upgrade gauge can be experimented further, at least this game fills a good niche for those wanting to crave some memories of playing Gradius games.

Not to mention that the three level routes distinguish yet delightly derive from the first three Gradius games in term of theme. Plenty of hard stuff to get people replaying this continuously, and to grind for more points to unlock more types.

The only concern is the amount of points required to spend on the unlocking types that take longer than desired. Maybe shortening the amount of points required could allow more flexibility with various types sooner.


Thank you for playing and posting a comment. I will consider about unlock cost sequentially.






This is a really fun game I got to stage 5 with a score of 375,000 no continues . Awesome game.


I am glad to see your effort. Please enjoy playing continuously.


This game is insanely good. Commercial quality easily 👍

The weak spot of this game is probably the upgrade system. I like the concept of it and it works for 90% of the time, but it can be unprecise in hectic times of the game and it just overall feels a little bit too complex given that you have to handle it while playing, at least for me.

Anyway, I've not beaten route A yet, but I'm on it. Great game.

I noted your opinion. Thank you for playing.


I've been following your game on Twitter for a long while, my username is StGshmups, I'm so glad to see it released!

Thanks for supporting me. I appreciate your continued support!