I got a first place prize but didn't get the achievement. How do you get this achievement? Anyone know?

Try visiting the achievement page. I'm pretty sure it should have been automatically awarded though :/

I did visit the achievement page and it's showing as I still need the achievement. :(

Hm, Have you sent in a ticket?

No, not yet. I wasn't sure if getting a 1st place prize triggered this achievement or not and wanted to make sure first.

Did you get the ? Because I think that's the prize you need to get for the achievement.

No....I didn't get that item.