Arqade really needs a tag for the game "Growtopia".
Is there a way we can suggest tags?
I think after making a question you can flag it for moderator attention with the other reason and then just ask them to make the tag.
Apparently >300 rep users can make tags: https://gaming.stackexchange.com/help/privileges/create-tags
So as Robotnik mentioned, just leave a comment asking someone to create a tag.