HAEGIN announced on the 2nd that it is rolling out a regular update for its mobile casual idle baseball game '2026 Professional Baseball GO!', introducing new guild content.

The newly added 'Guild Battle' content allows guild members to build up scores together against legendary pitcher lineups representing each club and compete for rankings across different stadiums. It will run for a one-week trial period, offering rewards based on individual cumulative scores and total guild scores per stadium.

In the equipment system, 'Eternal' tier equipment—higher than the existing Mythic tier—has been introduced. An 'Equipment Slot Enhancement' system has also been added, which uses 'Enhancement Parts' obtained from dismantling Eternal equipment to cumulatively grow batter and pitcher stats. Additionally, the maximum caps for individual player Transcendence and Breakthrough have been expanded to Stage 10 and Level 80, respectively.

The Pick-Up Recruitment system has also been revamped. Upon reaching a certain cumulative recruit count, players can select and guaranteed-recruit their choice of Franchise, Monster, or FA Season players. FA Season players who played from 2010 to 2014, including Jang Won-jun, Jeong Keun-woo, and Lee Yong-kyu, have also joined the roster.

Alongside this, 'Cheerleader Season 2' has begun, allowing players to collect photo fragments of five cheerleaders to boost team strength. The drop rates for photo fragments have also been increased.

Throughout September, HAEGIN plans to sequentially run a 'Board Game Event', 'Chuseok Exchange Event', and 'Asian Festival Attendance Log'. Additionally, the 'HARD Stage' for the 2015–2019 regular seasons has opened. Further details can be found on the official Naver Game Lounge.