Played multiplayer with my friend the other day for hours, we logged off and are trying to get back in the game together today but it won't show up on the browse public games section. He has it set to public but the server name doesn't show up on the list.

main menu -> about -> enable experimental updates
Game or Main menu > Options > Other > Enable experimental updates.

On Steam: Right click on Factorio in your Steam library > Properties > Beta > Select 'Experimental' in the drop down menu.

This worked, Thank you good sir!! :D

I have the game through Steam. Also it doesn't have enable experimental updates in the other section of settings. I wish i could show you a screenshot of it.

That's not even an option for me, it just says "changelog" and "back"

Anyone having the same issue? It hasn't auto updated to .13 and i can't find .13 on factorio.com to download. Any help?