Soukyugurentai

stub page

For replay videos, visit the Video Index.

Versions:

The Arcade version of Soukyugurentai released on ST-V is the original version of the game.

Several other versions exist :

- the Saturn ports (original and Otokuyo)
- Terra Diver (the US region of the arcade board.)

Each of these has a lower default difficulty than the arcade release. However if you raise the difficulty of the Saturn versions or Terra Diver by one level in Options, you can put it at the same level as Japanese arcade default difficulty. The Otokuyo version is a low price release of the game, it features the first stage of Battle Garegga playable as a demo, the ost from Mahou Daisakusen, Shippu Mahou Daisakusen, Battle Garegga, and several other features. The Saturn versions of the game have different bullet sprites, more slowdown on heavy sections, and less explosion sound effects (particularly noticeable on "Shinsen" and the turret wall before "Bakusan").

- PS1 port arcade mode

After raising the default difficulty by 1 (the equivalent of arcade difficulty for Saturn ports) the PS1 version will have significantly higher rank and difficulty than the other versions.

- PS1 arrange

It has lower rank than the console ports in the Special Mode but higher rank on arcade mode (needs confirmation), Obu, a stronger 4th ship, an extra stage at the end, voice acting, and has an ‘every’ extend system instead of just 2 extends. This makes it essentially a type of 'EX' home version.

Bomb bonus:

Bonuses are awarded for every bomb pickup once the player has reached 7 bombs (reaching 7 does nothing). Due to a bug, the actual stock also stops at 7 (it should correctly stop displaying at 9 and allow infinite stock, just like Mahou Daisakusen). Failing to pick up a bomb item clears the bonus index to 0, requiring a full restart of the bonus. Using a bomb or dying does not reset the bonus.

The bonuses are 1000, 2000, 4000, 8000, 16000, 32000, 655371. Due to a bug, the bonus index is incremented twice by accident, so you only see 1000, 4000, 16000, 655371.

Due to yet another bug, the bonus index is incorrectly capped at 6 (classical off-by-one due to confusing max bounds and array element count), exposing the beginning of a different data table as the final bonus amount (leading to the last bonus being worth 655371)

Messages by trap15 on July 2nd, 2022, STG Rev 2020 Discord server

Every time you destroy an item carrier, the game generates a number from 0 to 99. It compares that number to a threshold based on how many carriers you've destroyed since the last bomb appeared.

The table has the values 0, 4, 8, 8, 16, 32, 32, 32. It just stays at that last 32 if a bomb still hasn't appeared.

These are essentially the chances of getting a bomb:

1st - 1% 2nd - 5% 3rd - 9% 4th - 9% 5th - 17% 6th and later - 33%

Technically, the actual chances are ever so slightly higher than those percentages. The first one is 42,949,673/4,294,967,296, which is 1.000000000931322574615478515625%, for example. The RNG itself has 2^32 possible values, which cannot be divided evenly among 100 possible results. Results 0-95 have a slightly higher chance than 96-99. That difference is so small that it's basically negligible, which is why I rounded it.

You must destroy the carrier for the counter to advance or reset. If you let the carrier go off screen, the counter doesn't change. Once it reaches 33%, it stays there until a bomb appears.

So, once your bomb chance has increased after several carriers fail to drop a bomb, you really want to make sure you can grab the bomb if it appears. If it's unlikely that you'll be able to collect it, it's better to let that carrier go rather than risk resetting the counter.

Messages by sikraiken on September 29th, 2026, STG Rev 2020 Discord server

Bosses

Stage	Name
1	Stealth Bomber "Kokubetsu"
2	Orbital Laser Satellite "Shinsen"
3	Anti-air Modular Tank "Donryu"
4	Tactical Null-G Combat Craft "Akitaka"
5	Low-altitude Tank Carrier "Kaihou"
6-1	Prototype Planet-killer "Bakuzan"
6-2	Reborn Stealth Bomber "Kokubetsu Kai"
7 (PS1 only)	Light-band Irradiation Artillery Simulated Battleship "Chromium"