First of the three titles in the Gundemonium Collection, this pixel-style side-scroller brings the intensity of the 'bullet hell' shooter genre to Steam. Choose one of two playable characters, including an unlockable third character! Modify character weaponry to your liking!
User reviews:
Very Positive (112 reviews) - 94% of the 112 user reviews for this game are positive.
Release Date: Sep 27, 2011

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Buy Gundemonium Collection

Includes 3 items: GundeadliGne, Gundemonium Recollection, Hitogata Happa


About This Game

First of the three titles in the Gundemonium Collection, this pixel-style side-scroller brings the intensity of the 'bullet hell' shooter genre to Steam. Choose one of two playable characters, including an unlockable third character! Modify character weaponry to your liking! Dominate 5 levels of frenetic gameplay while being bombarded with high-impact weaponry. Each level culminates with a challenging boss to defeat. Three game play modes will keep the non-stop action going! Experience a new level of game-play: Enjoy Gundemonium Recollection while listening to a brand-new arranged soundtrack.

Key features:

  • 5 levels of intense bullet-flying action
  • Sweet Old school retro anime-style art
  • Two playable characters to choose from and a third you can unlock
  • Story, Practice and Mission modes to take your shooting skills to the max
  • 32 Steam achievements
  • Full online leaderboards
  • New arranged soundtrack by DM Ashura

System Requirements

    • Operating system: Windows® XP, Vista, or Windows 7
    • Processor: Intel® 1 GHz Processor (Recommended: 2 GHz)
    • Memory: 256 MB RAM (Recommended: 512 MB RAM)
    • Hard disk space: 500MB
    • Video: DirectX® 9 level Graphics Card
    • Sound: DirectSound-compatible Sound Card
    • DirectX®: DirectX 9 or above
Customer reviews
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Very Positive (112 reviews)
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82 reviews match the filters above ( Very Positive)
Most Helpful Reviews  Overall
34 of 36 people (94%) found this review helpful
1 person found this review funny
26.5 hrs on record
Posted: November 5, 2014
Alright, if you're here, then you probably know what the "bullet hell" subgenre is, or at least its parent genre, shoot 'em ups (from now on referred to as "shmups"), but if not, I'll briefly explain:

Shmups are generally defined as any top-down or side-scrolling shooter, such as Galaga, Space Invaders, and many others. Bullet hell games, on the other hand, take this to the EXTREME; some of the screenshots for this game should show you just how many bullets you'll have to deal with. To compensate for this, your character's hit box is extremely small, really only a couple of pixels big, so that this is at all possible.

With that out of the way, the actual review!

The presentation:
Generally pretty good quality sprite work; I wouldn't say it's anything outstanding, but certainly nothing to scoff at. The menus are a tad bland, but function well, and aren't boring; just simple.

The story:
It's a little hard for me to comment on this one, honestly; the story isn't really well told throughout the game. To give an example of how important the story is, there's an option to disable the pre-level "cutscenes", which are only one screen with text and some pictures anyway. I believe it has something to do with humanity doing something dumb, and that causes some evil person to attack (again? I'm not sure; I haven't played the first game), and you, being part of some millitary group, have to go and face her. Not terrible, but not super deep either. But that's probably not why you're here, is it? You're looking for...

The gameplay:
Is fantastic. Before you start the game, you have the choice between two characters, Eryth and Earl, and another once you beat the true final boss (which, I should mention, I have not done). Now, there are two conflicting sources on the amount of characters; one (this very Steam page) says that there are two starting characters, with the unlockable third, while the games official webpage states that there are FIVE characters, along with an unlockable sixth. Neither of these are completely correct. The second character, Earl, is actually a customizable character; you can use one of four presets, or you can mix and match her three selectable abilities. These abilities, of which Eryth has as well (however, Eryth is stuck with one skillset), include your normal shots, "bombs" (which almost never actually includes using a bomb), and "Mana Action", which requires your Mana bar to be filled up; this can be done by killing enemies. The game isn't too long, probably about an hour or less if your good; but that's a pretty tall order. The first time I played through this game (playing as Eryth, Revised (normal) difficulty), it took about two hours of multiple retries to get past these five stages. Despite the difficulty (which is pretty normal for these kinds of games), I had a blast, and felt extremely satisfied once I finally conquered it. Thanks in no small part to...

The music:
Now, personally, I loved the music. It's probably one of my favorite game soundtracks, and I'm not exaggerating; I rank this up there with Cave Story, Mega Man X, BlazBlue (the collective series), all of those amazing soundtracks. And the soundtrack actually comes including in the Steam folder for the game once it's installed, so that's a huge plus. However, looking at another review, it said that the musical wasn't all that great. So who knows, I might be in the minority on this one.

Hopefully this review didn't end up being too long-winded; I don't exactly have a lot of experience with reviewing. However, I found myself having to hold back on how much I said, because I quite bluntly love this game. It's one of my favorites, and I'm pretty sure the next few days will be spent on getting the achievements. I hope you decide to pick this game up, because it's definitely worth it; I plan on buying the other games in the series at some point soon as well.
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23 of 26 people (88%) found this review helpful
18.6 hrs on record
Posted: December 20, 2013
Although not as strong with it's gameplay as Gundeadligne, Gundemonium has superior visuals and a fantastic soundtrack.
This game is better for a single player experience!

-Multiplayer but sadly rare that anyone plays so get a friend, in-game it suddenly gets insane at difficulty 21 (Demonic).
-Visuals less detailed and has outline better for seperating the background from the foreground.

-Single player but is strong with it's levels and has a better climb in difficulty compared with Gundeadligne.
-Visuals sharper and more detailed but can be difficult to look at over the background at times (especially later level 3).

Both equally good games but for different reasons.
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26 of 42 people (62%) found this review helpful
4 people found this review funny
1.2 hrs on record
Posted: December 26, 2013
Do you like Touhou? You do? Ok then, buy this game!
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7 of 10 people (70%) found this review helpful
8 people found this review funny
0.3 hrs on record
Posted: June 14, 2015
Play two cute girls at once and shoot half naked women
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10 of 17 people (59%) found this review helpful
4.0 hrs on record
Posted: May 23, 2014
Excellent sprites, excellent music...
I can hardly tell WTF's goin' on half the time... So in other words, excellent Bullet Hell!
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2 of 2 people (100%) found this review helpful
48.2 hrs on record
Posted: July 13, 2012
The most extreme danmaku (bullet hell) game I've ever played. This game is so hardcore it even beats Touhou. You have a much smaller space to move around than touhou and the hitbox is very hard to spot. I also love the soundtrack and the character design. Reccomended to any fan of the bullet hell genre.
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4 of 6 people (67%) found this review helpful
1.1 hrs on record
Posted: December 14, 2011
recollect the gundemoniums for maximum points
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4 of 6 people (67%) found this review helpful
1.5 hrs on record
Posted: November 2, 2015
This game is quite addicting from what I thought. I really thought this would be a boring game and I wasted my dollars on it, no that's a true lie right there! I LOVE THIS GAME. It's worth your time!! It's addicting and I already had gotten good at it with just a spam of bullets!
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10 of 18 people (56%) found this review helpful
8 people found this review funny
2.4 hrs on record
Posted: January 17, 2015
So many ♥♥♥♥ing bullets I almost had a brain aneurysm.
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13 of 24 people (54%) found this review helpful
7.0 hrs on record
Posted: March 10, 2014
bullet hell rocks
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Recently Posted
3.2 hrs
Posted: June 27
Gundemonium doesn't hold back in keeping things hectic.

An updated version of the now outdated game, Gundemonium Recollection strives to improve on the basic formula that the original Gundemonium has set.


Recollection is a side scrolling bullet hell. By default you can either play as Eryth, our main protagonist, or one of the many Earl Support units, who are much more configurable. If you go through the game doing certain things, you can also unlock Elixirel, who is just as ridiculous as she is in the other Gundemonium games. Difficulty is, of course, fairly high, and the game will do everything in it's power to make you cringe at all those close calls you'll be having. The hitboxing is good, and nothing in the game feels "unfair," though you'll definitely be squeezing through some really tight bullet walls for most of the game. It's important to know where your hitbox is, something that's a bit difficult because the game doesn't give you an indication of where your hitbox is, except during non-combat sections (for some reason?...). Your characters do have indicators on their sprites to show where the hitbox is (for example, Earl units have a small bell to serve as their hitbox indicator) but an actual marker would be nice.


The game is beautifully sprited, with everything being vibrant, contrasting, and colorful. Also, anime tiddies as per the norm these days. There's even a censored version if you're put off by the nudity. Not sure why they added the nudity in but I'd assume it's a Gundemonium Original thing.


Absolutely worth it for the price that is offered, especially if it's on sale. Hell, just get the entire Collection. It's worth it, all three games are excellent for anyone who enjoys bullet hell games. Whether you want to expertly play the game, or enjoy it as a time waster, Gundemonium Recollection is pretty damn neato.
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7.0 hrs
Posted: June 15
Gundemonium is a wonderful 2d side scroller shum'p, specially with a controller the options menu have the option for make the game oldschool 1 hit kill, but I don't use this because I found the game pretty hard even with 3 hit kill, there is also multiple difficult setings, definitively one of my favorite shum'ps

+awesome soundtrack
+bullethell gameplay
+creative enemies

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0.6 hrs
Posted: March 6
Retro cutesy bullet hell at its finest. A good amount of challenge to it, yet can get fairly far in it on easy and being a noob to bullet hell, sadly there are no continues, only start with more lives. The biggest thing missing to me is a story. Would be so cool to see some dialogue and a story mode. But hey, its a good game for a great price. I say go out and buy Gundemonium Collection, its a blast! If you like anime at all you owe it to yourself.
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153.6 hrs
Posted: December 21, 2015
This is a best danmaku game on steam, and I got my new waifu from it.

Also, original ost>remix
Helpful? Yes No Funny
0.9 hrs
Posted: December 18, 2015
you get to be a hot anime girl killing other hot anime girls
Helpful? Yes No Funny
0.5 hrs
Posted: November 3, 2015
Challenging scroll shooter with cute graphics.
Helpful? Yes No Funny
<O_O> SAJewers
3.0 hrs
Posted: July 10, 2015
It's a standard Bullet hell. Good soundtrack, good visuals. Everything feels fine.

My only complaint is that the fullscreen mode isn't native fullscreen, but a resolution of 640x480
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1.0 hrs
Posted: June 13, 2015
So far playing through this, I only have one complaint: it's hard to tell where your hitbox is on this little girl you play as, which is something that sounds worse out of context. Other than that, it's bretty good.
Helpful? Yes No Funny