Click Library in Steam, Click "Games and Software" drop down and enable "Tools".







Install Sega Genesis & Megadrive Classics Workshop Tool

After all your hard work making your mod that you didn't download from an emulator rom site it will look like this;



Right click and rename the extension to .bin like this;

Launch Sega Genesis & Megadrive Classics Workshop Tool;


Select "New Mod".
1) Add a title to your mod.
2) Give it a description (sometimes this may cause validation errors), you can leave blank if you like.
3) Select a game volume that you wish to mod, pick a game that you have already purchased I used "Golden Axe".
4) Choose your mod file that you renamed previously (.bin format).
5) Choose an image for your game on the workshop.
6) Set privacy mode and add any change notes if you like.

Validate to make sure there are no errors, if followed correctly you can now Upload to the Steam Workshop.

Subscribe to your mod by clicking your name in steam and selecting content. Then head over to Workshop Items and click your newly uploaded mod image. Then hit the subscribe button.


Launch Sega Genesis & Mega Drive Classics from steam, click your game on the shelf (that you selected from the drop down in the Workshop Tool) and choose mods. When you click your mod it will load up.

Enjoy.