Welcome to the wonderful world of MS-DOS game reverse engineering.

Cosmo's Cosmic Adventure floppy disk version in a CD case. Unusual artwork on the front cover.

Back cover of case with screenshots and text.

Close up of white 3.5" floppy disk inside the CD case

I own the Cosmo version. I haven't tried dumping the disk yet.

The 2026 SMS Power! Competitions are finally open! 🤩

Coding competition: Write something that runs on a Sega 8-bit home system which isn't a hack. A game, a demo, a tool! 👾

Hacks competition: Make a hack of a game for a Sega 8-bit home system. 🩹

Music competition: Make some music that either […]

DOS DOS

I seem to end up reverse engineering games more than playing them.

CGA Game Jam 2026 A game jam from 2026-01-07 to 2026-02-28 hosted by TheLobdegg. This is a casual game jam focusing on the old CGA video card / standard. Games can be either .EXE or .COM files and must be capable of ru...

The Pain Train stops for no one! DOS coders, let's see some cyan/magenta magic!

itch.io/jam/cga-game...

🎉 Happy New Year! 🎇
Get started with the BioMenace Remastered Level Editor right now! Here's some examples of what other players have made already! Looks fun, right? We can't wait to see more levels from the community! Build one today!

Yeah I've almost finished adding the sound effects. Should have a new version out soon.

Awesome, I'm going to try adding joystick support too in the future.

Nice, hopefully it behaves itself. No dos extenders on this one.

How did you go with skifree? Did it work ok?

The Simpsons: Hit & Run - DualShock1 Fix - Content These patches allow you to use a Ps1 DualShock 1 analog controller with the game. For some reason the game only recognises DualShock2 controllers even though DualShock1 controllers work fine. These p...

The Simpsons: Hit & Run - DualShock1 Fix (PS2) Added

Quest for Erasmus screenshot of pixel art of an office and some wizard stuff like a staff and monster head hanging on the walls

screenshot of ski free, which wasn't originally a DOS game, of someone skiing downhill

Europa Panic screenshot of top down view of someone shooting at monsters

Quid Pro Quo screenshot of people investigating a safe

DOS Games Are Alive and Well on Itch
virtualmoose.org/2025/12/09/d...

Let's wrap up this streaming business by sampling some DOS Game Jam games!

twitch.tv/emmfoolery

Is it a booter?

I was wondering why line 95 was there . It didn't seem to have a purpose.

This is the first time I've made DOS freeware in 20 years. The time was right, and what a ride. I made sure it can run on my Tandy 2500, a 386SX/20, off a floppy. You can play via browser too.

Check the others out too. So many good games!

hollerpots.itch.io/europa-panic

#msdos #ega #adlib #tandy

I like that you have de-windowed your keyboard.

Submissions to DOSember Game Jam

THIRTY NINE ENTRIES. 😐

Go play 'em! Leave a lovely comment! Follow the devs! Get inspired!

I can relate. What's your current fixation?

Does this mean that Windows might suddenly think your drive is about to melt or fail in some other strange way due to weird SMART health values being transmitted by PicoIDE?

DOSember Game Jam A game jam from 2025-08-31 to 2025-11-30 hosted by Emmfoolery. DOSember is an annual streaming event on twitch.tv Now approaching its 6th year, DOSember participants spend the entire month of December...

Only ≈ 10 days left to submit something for the DOS Game Jam!

Did you know:
💾 There's still time to make something!
💾 You can submit something incomplete!
💾 Perfectionism can severely impact your mental, physical, and emotional health, as well as personal relationships?
💾 DOS Games are fun!

This is the latest build of my DOS game jam game. It’s currently 208kb, single executable, and that’s with a bunch of standard C libraries still linked in. Plays well, too IMHO :D

PicoIDE An open source IDE/ATAPI drive emulator for vintage computers

It's official! #PicoIDE, the open source IDE/ATAPI drive emulator I've been working on for the better part of this year, will be launching at Crowd Supply! Go there to sign up for updates and to be notified when the campaign is live: www.crowdsupply.com/polpotronics...

I have used an exe packer to reduce it a bit too. I think the unpacked exe is about 100k. I could save some more space by reducing the number of characters in the font set too. But I'm happy with the current size so I'll probably leave it at that.

Yeah I can take a look. It should be doable. I still have the stubs in the code for playing the sfx.

Skifree - DOS Edition by rocketfry The classic game Skifree - Ported to MS-DOS

I've just released the first version of my Skifree DOS port.
#DOSember #DOSGaming
All the features you know and love from Skifree windows are there. Just now in MS-DOS
rocketfry.itch.io/skifree-dos-...

More progress on my #DOSember game jam entry.
Skifree DOS edition!
Now running on an actual DOS machine.
#DOSGaming

Yup that will be included too. It's currently broken at the moment but it should be an easy fix.

I'm working on an entry for the #DOSember Game Jam.

Skifree DOS edition!

Are you sick and tired of booting into Windows just to play Skifree? Now you can get your skiing fix directly in DOS.

There's still a bit to do but I'm happy with how it's progressing.
#DOSGaming