One Hit Kill Participate in the Arena and get full score for all problems without making a submission that is not a full score
3
Creator of the Stars: Chapter 3 Participate as a jury, a tester, or a staff for 10 times in the Arena
4
Arena: Half Solves Γ 10 Participate as a rated contestant for 10 times in the Arena and get full score for half or more of the problems in the contest
5
Alpha Contributor Contributed once or more between June 6th and July 12th, 2019
12
Record of the Stars: Chapter 4 Participate as a rated contestant for 20 times in the Arena
13
Creator of the Stars: Chapter 2 Participate as a jury, a tester, or a staff for 5 times in the Arena