A downloadable game for Windows

Abyssal Infants

A side scrolling shoot em up for the Sega Genesis / Mega Drive created with SGDK, for NeoGeo created with NGDK and NGFX SoundBuilder and for PSX (Playstation 1) created with PSn00bSDK

It is made for the NTSC (60Hz) but it will run in PAL (50Hz) but it will be slower.

Controls for the MegaDrive.

D-Pad to move.

A to shoot.

B or Z or Left Shoulder to slow down.

C or Right Shoulder to Dash. Keeping the Button pressed works like A.

Start Pause.

The second player can drop in out by pressing Start.

The game plays better with a Six-button joypad, cause Slow Down and Dash use the shoulder buttons.

In the version with Blast Em emulator with keyboard

A to Shoot

S to Slow Down.

D to Dash.

Enter is Start.

In case of a Dual Shock joypad.

Square or L1 to Slow Down.

X to shoot.

Circle or R1 to Dash.

Option or Start to Pause.

For two players, you need two joypads.

About the Production of the game.

The game initially was created in the period of one month for the 4 MB game jam, but the development continued afterwards.

The Jam version is the file : Abyssal_Infants_4MB_Jam_v1.zip

The latest and recommended version is the : Abyssal_Infants_with_BlastEm.zip

That comes packed in with the BlastEm emulator for easier use.

The Abyssal_Infants.bin that is just the bin (rom) for the Sega Genesis / MegaDrive.

The abyssal_infants.neo is the NeoGeo version of the game for NeoSD or Mister FPGA. Please report if this is working.

The ssideki.zip is a rom for NeoGeo to be used with MAME.

The abyssal_infants_psx.zip is the PSX version. DuckStation is the recommended emulator.

Everything was created for this game, expect:

The Sun Demon, drawn by https://twitter.com/BoJustBo1

The music track Less Abyss was partly created for the Eyes of Doom.

The sound effects for Shooting and Player Damage were created for The Eyes of Doom.


The Explosion sound effect is a modified version of:


The Thunder sound effect is a modified version of:


The sound effects Tiny Death, Boss_Fire and Boss Death are modified versions of:


BlastEm the Sega Genesis / Mega Drive emulator:


StatusIn development
Rated 5.0 out of 5 stars
(3 total ratings)
Tags16-bit, 2D, Arcade, Mega Drive, megadrive, Pixel Art, Retro, Sega Genesis, Shoot 'Em Up, Side Scroller
Average sessionAbout a half-hour
InputsKeyboard, Joystick
MultiplayerLocal multiplayer
Player count1 - 2


Abyssal_Infants.bin 768 kB
Abyssal_Infants_with_BlastEm.zip 2.7 MB
abyssal_infants_psx.zip 29 MB
abyssal_infants.neo 6.7 MB
ssideki.zip 1.6 MB
Abyssal_Infants_4MB_Jam_v1.zip 2.5 MB

Install instructions

Unzip and run the run.bat file.

Or get the .bin file to use it with the Sega Genesis / MegaDrive emulator of your choise.

Or get the .neo file to use it with NeoSD or Mister. Not tested please report for errors.

Or get the ssideki.zip to use it with MAME. (This rom replaces the Super Side Kick)

Development log

View all posts


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Very nice game buddy! Working fine on my mvs cab/neo sd pro. Just a thought, maybe map button C regular shot to Button A? Other then adding the credits you have done a phenominal job! You should definately add a donate button. Thanks for making this. I like the difficulty of it....


I haven't compiled this for NG for almost 2 years now. I'll have to check it out if I can compile it to make changes.

(1 edit) (+1)

Put some play in today, no luck passing level 2. Gets pretty insane which is a good thing. Can't believe i hadn't ran up on this sooner. When you get around to it, hit up tcdev on adding that credit support, would be awesome. Will definately follow your work. Appreciate it!


Yet to try it, but you should add your own entry into the hash/neogeo.xml file so you don't need to masquerade as Super Side Kicks.


I love this game! It's painfully hard but manages to be fun despite that

Thank you very much for this comment.


do i download v1.zip or v2.zip? i'm assuming v2


Thanks for trying.


I put this on a flash cart and played it over lunch for a few minutes on my model 2 Genesis. I only reached level 2 (I'm bad at video games) but as far as I can tell it works perfectly.

BTW I love the look and feel of this game. It's very fun. Thank you for sharing it :)


Thank you for playing, for informing me and for your kind words. 

You are the first reaction over my game and you made my day.

And yes it is quite hard. I tried to make it as hard as  the old games.


you're very welcome!