A downloadable game for Windows

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This is only a demo for a work-in-progress game and is not representative of the final product! So that means the gameplay, graphics and sound design are not final and are all subject to potential changes later on.

After retrieving an artifact buried at the bottom of a lake, student divers Itou and Yena find themselves being hunted by a local armed group called 'Vigilanti' looking to steal their treasure. Now the pair must escape the region and bring their artifact back to their school!

Heavily inspired by arcade games from the 90s, Aqua Ippan is a ‘Shoot’em Up’/platformer game currently in development that can be played by one or two player(s). Despite being a modern game, it feels and plays like a true arcade classic, and pays homage to the Metal Slug series with its artstyle, detailed animations and jazz-fusion music.

While they are underarmed, these divers make up for it with their flexibility and speed! They're capable of shooting their spearguns quickly at multiple different angles.

They can also rescue some kids part with the 'Spray Gang' that got caught vandalising the place, which in return can help the divers by closely following them and attacking anyone trying to sneak up on their saviors!

To help even the playfield, the duo can come across and collect these helpful items during their escape:

This carbonated drink packs quite the punch! One sip of this and you'll feel reinvigorated, giving you a second chance at life in case anything happens.
Left and forgotten by previously wandering divers, these oxygen tanks are heavy and sturdy enough to knock the lights out of anyone unfortunate enough to get hit by one of these 40kg units!
When the Vigilanti invaded the Spray Gang's turf, the taggers decided to steal some bricks to later use them against the army. Only they know where these boxes are, so be sure to rescue them to access these...

Want to see more content about this game? Be sure to check out the website!
Aqua Ippan Website

If you want to submit a bug report, please contact me at the following address:

Want to donate to help the project? Feel free to go to my Ko-fi page to leave a donation!
Division 六's Ko-fi Page

Art/Programming: Division 六 Youtube
Soundtrack: Hakurou Twitter
Programming Help: Soldier Rebel Youtube
Item Design: YinyangGio Twitter
Special Thanks: The Huntress The Spriters Resource
Lt-Abdelhak Newgrounds
Legafe Twitter
Updated 7 days ago
Published 18 days ago
StatusIn development
Rated 4.9 out of 5 stars
(48 total ratings)
AuthorDivision 六
GenreAction, Adventure, Platformer
Tags16-bit, 2D, Arcade, Casual, Local Co-Op, Pixel Art, Retro, Shoot 'Em Up


Download NowName your own price

Click download now to get access to the following files:

AquaIppan_2023Demo_v0.1.4_FullScale.zip 26 MB
AquaIppan_2023Demo_v0.1.4_SquareScale.zip 26 MB

Development log


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this remind me of metal slug



the game is perfect!! the gameplay and graphics are amazing!! great job!!

Thanks a lot for saying so!


this is so good, cant wait for full version :) nice work 

Thanks for looking forward to it!


Fun demo! The sprites and scenery all look great!

I died too many times... I am clearly out of practice. Gotta get my Metal Slug groove back for when the game is finally completed.

Thanks a lot for playing the demo and enjoying the spritework!
To be fair, the difficulty is set at 8 by default, so it's fair not to no-death run the stage on your first try haha

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AMAZING WORK! I cannot wait to see the final version. best of luck with development!

I'll definitely be showing this off to my Twitch audience and sharing the link to this page.

Thanks for the nice comments and wishes!

This is just fantastic.

Thank you!


I love this game! 
(video in Spanish)


Thanks for playing it and making a video about it!

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How dare you make a game that looks amazing like this? :D Metal Slug is one of my favorite games, and this game looks and feel just like that. Awesome work guys!
ps.: your deviant art link takes me to your twitter page

Thanks for liking the graphics and game so far!
About the links, they should all work without problem now


All that's needed now is to get the "GET BONUS" voice from Blazing Star, to announce the weapons and Pickups like the Metal Slug Announcer Guy and I'm Sold!

Thanks! We'll look into having a better sound design later on haha


thats some really cool art lols




I really liked the gameplay changes compared to the main MS games, like the existence of a 1UP item and how you only lose one Spray Gang per life, and the count only goes to zero per continue. It really feels like a fun and well balanced challange  for both newcomers and more experienced MS players. I also felt the gameplay was a little more fast paced than the og Metal Slugs, but maybe it's just me. I'm glad I found out about this project. I'm very much looking forward to it.

Thanks for liking the gameplay so far! I'm glad you appreciate the overall balancing of the ally system, since it wasn't the easiest thing to design. The game is also really focused on player movement and speed compared to MS you're right, which explains why the players move more quickly and why the allies have been thoroughly programmed to follow the players as accurately as possible.
Thanks again for liking the demo and recognising the unique side of the gameplay!


No problem. It's really cool to hear this info. Thank you and the rest of the team for this demo and once again, very much looking forward to it!

cool pfp



where is it from? 


From the first Metal Slug Tactics trailer.

thank u


Beautiful gameplay you made Division 六. Have you planned to add more players in the future?

Thanks for saying so! 

Maybe not brand new ones, but we'll see!


I was crying with happiness while playing it, Thank you

Thanks for liking the demo so much!


this looks a lot like Metal Slug! really like the pixel art!

Thanks for saying so!


such interesting pixelart, love it, so pretty!

Thanks for liking the visuals!


Played through the demo twice. The control and art felt spot on. My only small complaint is that the spear gun and oxygen tanks' sound/visual effects aren't as satisfying as their Metal Slug equivalent. Looking forward to seeing more of this in the future, especially once the heavy machine gun and metal slug vehicle equivalent are introduced :)

Thanks for playing the demo and enjoying it!
The overall sound design is far from being finished (hence why a lot of sounds are taken from other MS titles at the moment), so that aspect is going to eventually have a big overhaul!
We'll see what we'll do regarding introducing more gameplay elements, so stay tuned for that!



And I made a video on Bilibili which is a No-hit-walk-through, I'll put my link below.

Story is fun to read, and make me wonder why these students are fiding relics, for research? Maybe has secrets?

The shooting part it's bit sticky when you try to turning around or ducking and shoot, but they're students come on, not a blonde hair guy shoot up everything with a heavy machine gun.

And I tried to translate your game title but I can't get over the "Ippan" meaning, so I translate the game title into Simplified Chinese as 《深海计划》, I used "Plan(计划)" to exchange "Ippan(一般)" because I think they got mission and they did something and coming back with the relic, that's like "Meaning Translation" I guess, if that's an incorrect translation meaning please tell me and I'll try my best to promote your game in China!

Walk-through with no hit

Thanks for playing the game and looking at the website's content!
Also thanks for the comments on the gameplay, there's definitely small improvements that could be made while also staying true to the fact that our diving protagonists aren't well trained for this kind of situation haha
About the name 'Ippan', it is Japanese meaning 'regular' or 'normal', to reflect the fact that the players are just simple diving students and not top-grade commandos. I kept it in Japanese just because it rolled off the tongue pretty well and is quick/easy to write!
So if you want to translate the name of the game, you can say 'Aqua Regular'!
Thanks again for the positive feedback and for spreading the word with others!


Mi e piaciuto tanto e spero che lo finiate al più presto e penso che abbia delle buone potenzialità 

Da patito e amante dei metal slug dico di si 

Yeah thanks a lot for believing in the project!


As a huge fan of the Metal Slug games, this absolutely nails the style to a tee, and I LOVE IT! It's amusing how the "grenade" equavilient are just oxygen tanks and bricks. Not as bombastic, but they sure get the job done against the bad guys! Just one level long, but definetely worth my time!


Thanks a lot for playing it! While the divers would probably find grenades way more useful, oxytanks and bricks are the best they could find haha


Made a video

Thanks for playing it you two!

Loved playing it and looking forward to more


Loved the Game! My wife has played metal slug her whole childhood on the arcade machines so she was really excited seeing a game with similar gameplay and art. Felt a bit disappointed as we felt it was too short but we understand its the first demo. Can’t wait to see more content added soon!


Thank you for both playing it! It's indeed on the shorter side, but the idea is to extend the length of the later stages just like Metal Slug

Though thanks again for looking forward to the rest of the development!


I love this spin on Metal Slug!  Outright laughed out loud whenever they gave me bricks to break the shit out of the boss.  Keep up the good work, and I can't wait for more!

Oh!  Question, will you be adding netplay in the future?


Thanks a lot for checking it out! Glad you liked the tagger kids hastily giving you bricks as a way to help haha
About netplay, I can't really say for now since I don't know a whole lot about setting an online mode, but I'll keep the idea in mind for later!


Real great start, the jump's a bit floaty but otherwise handles great! Hitboxes also feel very nice so far.

The lack of any sort of weapon options is very disappointing. Throwing oxygen tanks and bricks feels really lame compared to grenades; maybe if the tanks could hit multiple enemies on the bounce it would feel better? Also, the follower ally never seems to actually do much.

If you aren't going to increase weapon variety, you'd better go real hard on enemy variety. The boss and sub bosses were real nice, and the soldiers are fine so far, but you'll need a lot more to keep people engaged over a full 5-8 levels or however many you're planning.

I can already tell I'll probably be buying the finished version, so keep up the good work!

Also, how does the scoring system work? Even taking a potential no-miss bonus into account I still can't figure out where all those points on the demo chart's top score come from.


Thanks for playing the demo!
Also appreciate the constructive comments on the game, with this being the 1st stage that means that there's not a lot for players to play with yet, so more things are gonna be introduced later on! Same for the allies, it's very likely they'll get rebalanced as the game gets further developed
About the score, if you can maintain a couple of good combos and get a good amount of items/Spray Kids, you should be able to get on the scoreboard



Thanks a lot for playing!

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Oh. My. God.

I can't express enough how much I love this demo. Like LOVE, love. I can't wait for further development, the potential this thing has is ENORMOUS.

Its a Metal Slug fangame by someone who knows their Metal Slug.  You like Metal Slug, you like Aqua Ippan, simple.


Haha, thanks for playing! I did try my best to do a faithful spinoff kind of game to MS, so I'm glad you appreciate it!





Thank you for playing!


Awesome and promising demo! I love the art-style and animation, it’s very faithful to Metal Slug. Gameplay-wise, controls felt tight and there was a good challenge in difficulty! Overall, I’m looking forward to more! Great work and good luck with development!


Thanks a lot for playing! And glad that you loved the demo haha


I really love this game! It looks awesome and playing it was a ton of fun. The sprites and backgrounds couldn't be more perfect. Looking forward to playing the final version!

One thing i'd like to see change if possible would be the Oxytanks trajectory since it's a bit difficult to hit enemies specially while jumping. Making it into an arch might help.

Alright, thanks for playing it! I'll probably continue to tweak some aspects of the gameplay later on, so thanks for the notice!


Hello there! Very promising demo, I think I can safely say that this is the best Metal slug-inspired game I've ever played. The pixel art and spritework is on point, the music is amazing and the gameplay super addictive. Reminded me a lot of these awesome arcade classics we used to get. Keep up the good work, I'll be waiting for the full version with anticipation. :)


Heyy thanks a lot for playing the game and doing a video on it!


Hi, will AquaIppan be available for ARM CPU architecture?

I can't say for sure, if you want to verify I'd recommend searching if Gamemaker Studio 2 games are compatible for that architecture, since Aqua Ippan uses the same engine

Looks like ARM64 architecture is an option within GameMaker, look ...


Are there chances you can create a build for ARM64 architecture of the demo?

For the demo no, but I'll see what I can do for the final release, thanks for link!

Good to know!


Amazing game. I'd like to help with Russian translation for it if you will be implementing that

Thank you! I'm not sure if I'll make localizations of the game later, but thanks for the offer!


As someone who loves Metal Slug I'm 100% playing this!


Thank you for saying this!



Eyy thanks for playing it!