MapleStory Universe (MSU), operated by Nexon blockchain subsidiary NEXPACE, suspended services after unauthorized access to part of its off-chain server infrastructure, then resumed the game, website and marketplace at 6:40 a.m. Korean time. Maintenance continued on the OpenAPI used by outside developers, with a target of resuming the following week. The accessed information included some users’ wallet addresses, nicknames, IP addresses, access locations, device and browser details, login histories, session keys, partial email addresses, linked social-account information, token transfers, marketplace transactions, and changes to in-game items and currency. Data from 328 Builder Center applications, including developer wallet addresses, API keys and OAuth client IDs, was also accessed. MSU said the exposed API keys could not affect assets, wallet private keys were not transmitted to or stored in its systems, and operational private keys were not exposed. The blockchain, smart contracts and token supply were unaffected, and no asset theft had been confirmed, although the operator warned that the information could enable wallet deanonymization, phishing and impersonation attempts. The incident adds pressure to a contracting blockchain-gaming business: NEXPACE’s NXPC token was down about 94% from its peak of $2.621 in May last year, while average daily active wallets fell 64% year-on-year to 8,135 and new sign-ups dropped 96% to 1,201.