https://imgur.com/a/jR6XacY
How can I make this thing? Like "mapped by ..." on guest difficulty

Go to beatmap discussion page and click the "Difficulty Owner" button (it's located below the hype train bar)

Pasi_ wrote: 3p2a16

Go to beatmap discussion page and click the "Difficulty Owner" button (it's located below the hype train bar)

Thank you!

You can assign multiple people - as long as they had a part in it. If your map gets ranked, feel free to ask a GMT or a NAT to set that up for you :-)