High-end client often used for HvH (Hack vs Hack) scenarios.
While a definitive list of "18 hacked clients" from 2021 is not documented in a single public source, archives and community records show several prominent clients that were active during this period. The number likely originates from community lists or the "EaglerClientArchive-1.8" project, which includes in its first release. 18 hacked client eaglercraft 2021 2021