ABGA & Klaytn Blockchain Gaming Hackathon 2022: Top 8 Teams Officially Announced Singapore - September 19, 2022 The semi-final (second round) Top 8 teams for the Blockchain Gaming Hackathon 2022 were formally revealed on September 16 by ABGA (Asia Blockchain Gaming Alliance) and Klaytn, the most influential public chain in South Korea, with the scoring and selection successfully concluded..